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Posts posted by Flipping Physics

  1. Name: AP Physics C: Rotational vs. Linear Review (Mechanics)
    Category: Rotational Motion
    Date Added: 2017-04-28
    Submitter: Flipping Physics

    Calculus based review and comparison of the linear and rotational equations which are in the AP Physics C mechanics curriculum. Topics include: displacement, velocity, acceleration, uniformly accelerated motion, uniformly angularly accelerated motion, mass, momentum of inertia, kinetic energy, Newton’s second law, force, torque, power, and momentum.
    Want Lecture Notes?

    Content Times:
    0:12 Displacement
    038 Velocity
    1:08 Acceleration
    1:33 Uniformly Accelerated Motion
    2:15 Uniformly Angularly Accelerated Motion
    2:34 Mass
    3:19 Kinetic Energy
    3:44 Newton’s Second Law
    4:18 Force and Torque
    5:12 Power
    5:45 Momentum

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    AP Physics C Review Website

    Next Video: AP Physics C: Universal Gravitation Review (Mechanics)

    Previous Video: AP Physics C: Rotational Dynamics Review - 2 of 2 (Mechanics)

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    Thank you to Sawdog for being my Quality Control individual for this video.



    AP Physics C: Rotational vs. Linear Review (Mechanics)

  2. Name: AP Physics C: Rotational Dynamics Review - 2 of 2 (Mechanics)
    Category: Rotational Motion
    Date Added: 2017-04-28
    Submitter: Flipping Physics

    Calculus based review of the cross product torque equation, how to do a unit vector cross product problem, rotational equilibrium, the rotational form of Newton’s second law, the angular momentum of a particle and of a rigid object with shape, the derivation of conservation of angular momentum, and a conservation of angular momentum example problem which reviews a lot of the pieces necessary to understand conservation of angular momentum.
    For the calculus based AP Physics C mechanics exam. Want Lecture Notes?

    Content Times:
    0:15 The cross product torque equation
    1:10 Unit vector cross product example problem
    3:32 Rotational equilibrium definition
    4:55 Rotational form of Newton’s second law
    5:37 Angular momentum of a particle
    7:08 Angular momentum of a rigid object with shape
    7:49 Conservation of angular momentum derivation
    8:57 Conservation of angular momentum example problem
    10:57 Visualizing the problem
    12:04 The conservation of angular momentum equation
    12:54 Solving for the constant value of the variable y.
    14:04 Substituting in known values
    15:38 Does our variable answer make sense?

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    AP Physics C Review Website

    Next Video: AP Physics C: Rotational vs. Linear Review (Mechanics)

    Previous Video: AP Physics C: Rotational Dynamics Review - 1 of 2 (Mechanics)

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    Thank you to Sawdog for being my Quality Control individual for this video.



    AP Physics C: Rotational Dynamics Review - 2 of 2 (Mechanics)

  3. Name: AP Physics C: Rotational Dynamics Review - 1 of 2 (Mechanics)
    Category: Rotational Motion
    Date Added: 2017-04-28
    Submitter: Flipping Physics

    Calculus based review of moment of inertia for a system of particles and a rigid object with shape, the derivation of rotational kinetic energy, derivations of the following moments of inertia: Uniform Thin Hoop about is Cylindrical Axis, Uniform Rigid Rod about its Center of Mass and about one end, also the parallel axis theorem, torque, the rotational form of Newton’s Second Law, pulleys with mass and the force of tension, the Right Hand Rule for direction of torque, and rolling with and without slipping.
    For the calculus based AP Physics C mechanics exam. Want Lecture Notes?

    Content Times:
    0:10 Moment of Inertia of a system of particles derivation
    1:46 Rotational Kinetic Energy derivation
    2:49 Moment of Inertia of a rigid object with shape derivation
    3:52 Moment of Inertia of a Uniform Thin Hoop about its Cylindrical Axis derivation
    5:31 Moment of Inertia of a Uniform Rigid Rod about its Center of Mass derivation
    8:02 Moment of Inertia of a Uniform Rigid Rod about one end derivation
    9:16 The Parallel Axis Theorem
    11:29 Torque
    12:21 Simple torque diagram
    14:14 Rotational form of Newton’s Second Law
    15:07 Pulleys with mass and the Force of Tension
    15:33 The Right Hand Rule the for the direction of torque
    16:56 Rolling without Slipping
    17:40 Rolling with Slipping

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    AP Physics C Review Website

    Next Video: Review of Rotational Dynamics for AP Physics C: Mechanics - Part 2 of 2

    Previous Video: AP Physics C: Rotational Kinematics Review (Mechanics)

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    AP Physics C: Rotational Dynamics Review - 1 of 2 (Mechanics)

  4. Name: AP Physics C: Rotational Kinematics Review (Mechanics)
    Category: Uniform Circular Motion
    Date Added: 2017-04-09
    Submitter: Flipping Physics

    Calculus based review of instantaneous and average angular velocity and acceleration, uniformly angularly accelerated motion, arc length, the derivation of tangential velocity, the derivation of tangential acceleration, uniform circular motion, centripetal acceleration, centripetal force, non-uniform circular motion, and the derivation of the relationship between angular velocity and period.
    For the calculus based AP Physics C mechanics exam.
    Want Lecture Notes?

    Content Times:
    0:10 Instantaneous and Average Angular Velocity and Acceleration
    1:14 Uniformly Angularly Accelerated Motion
    2:16 Arc Length
    3:22 Tangential Velocity Derivation
    4:29 Tangential Acceleration Derivation
    6:03 Uniform Circular Motion and Centripetal Acceleration
    8:04 Centripetal Force
    9:20 Non-Uniform Circular Motion
    10:21 Angular Velocity and Period Relationship Derivation

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    AP Physics C Review Website

    Next Video: AP Physics C: Rotational Dynamics Review - 1 of 2 (Mechanics)

    Previous Video: AP Physics C: Momentum, Impulse, Collisions and Center of Mass Review (Mechanics)

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    Thank you to Natasha Trousdale, Aarti Sangwan, and Jen Larson for being my Quality Control team for this video.



    AP Physics C: Rotational Kinematics Review (Mechanics)

  5. Name: AP Physics C: Momentum, Impulse, Collisions and Center of Mass Review (Mechanics)
    Category: Momentum and Collisions
    Date Added: 2017-04-28
    Submitter: Flipping Physics

    Calculus based review of conservation of momentum, the momentum version of Newton’s second law, the Impulse-Momentum Theorem, impulse approximation, impact force, elastic, inelastic and perfectly inelastic collisions, position, velocity and acceleration of the center of mass of a system of particles, center of mass of a rigid object with shape, and volumetric, surface and linear mass densities. For the calculus based AP Physics C mechanics exam.
    Want Lecture Notes?

    Content Times:
    0:11 Momentum
    0:38 Momentum and Newton’s Second Law
    1:44 Conservation of Momentum
    2:35 Impulse-Momentum Theorem
    4:23 Impulse Approximation and Force of Impact
    5:32 Elastic, Inelastic, and Perfectly Inelastic Collisions
    6:39 Position of the Center of Mass of a System of Particles
    7:19 Velocity of the Center of Mass of a System of Particles
    7:54 Acceleration of the Center of Mass of a System of Particles
    8:31 Center of Mass of a Rigid Object with Shape
    10:09 Volumetric, Surface, and Linear Mass Density

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    AP Physics C Review Website

    Next Video: AP Physics C: Rotational Kinematics Review (Mechanics)

    Previous Video: AP Physics C: Integrals in Kinematics Review (Mechanics)

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    Thank you to Aarti Sangwan, Jordan Bueno, and Michael Nelson for being my Quality Control team for this video.



    AP Physics C: Momentum, Impulse, Collisions and Center of Mass Review (Mechanics)

  6. Name: AP Physics C: Integrals in Kinematics Review (Mechanics)
    Category: Kinematics
    Date Added: 2017-04-02
    Submitter: Flipping Physics

    Calculus based review of definite integrals, indefinite integrals, and derivatives as used in kinematics. Graphs of position, velocity, and acceleration as a function of time are compared using derivatives and integrals. Two of the uniformly accelerated motion (or kinematics) equations are derived using indefinite integrals.
    For the calculus based AP Physics C mechanics exam.
    Want Lecture Notes?

    Content Times:
    0:11 Rearranging the acceleration equation to get change in velocity
    1:41 Rearranging the velocity equation to get change in position
    2:06 Comparing graphs of position, velocity, and acceleration as a function of time
    3:28 Using the integral to solve for one of the uniformly accelerated motion equations
    4:44 Using the integral to solve for a second uniformly accelerated motion equation

    FYI: I do not teach integrals until we get to Work. By then the students who are taking calculus concurrently with AP Physics C Mechanics have had enough experience with derivatives that they only freak out a little bit when I teach them integrals. 

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    AP Physics C Review Website

    Next Video: AP Physics C: Momentum, Impulse, Collisions and Center of Mass Review (Mechanics)

    Previous Video: AP Physics C: Work, Energy, and Power Review (Mechanics)

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    Thank you to Mark Kramer and Aarti Sangwan for being my Quality Control team.



    AP Physics C: Integrals in Kinematics Review (Mechanics)

  7. Name: AP Physics C: Work, Energy, and Power Review (Mechanics)
    Category: Work Energy & Power
    Date Added: 2017-03-30
    Submitter: Flipping Physics

    Calculus based review of work done by constant and non-constant forces, Hooke’s Law, Work and Energy equations in isolated and non-isolated systems, kinetic energy, gravitational potential energy, elastic potential energy, conservative vs. nonconservative forces, conservation of mechanical energy, power, neutral, stable, and unstable equilibrium.
    For the calculus based AP Physics C mechanics exam. Want Lecture Notes?

    Content Times:
    0:11 Work done by a constant force
    2:25 Work done by a non-constant force
    3:58 Force of a Spring (Hooke’s Law)
    4:52 Calculating the work done by the force of a spring
    6:26 Net work equals change in kinetic energy
    7:02 Gravitational Potential Energy
    7:50 Non-isolated systems work and energy
    8:29 Isolated systems work and energy
    9:02 Conservative vs. Nonconservative forces
    10:10 Conservation of Mechanical Energy
    10:45 Power
    12:09 Every derivative can be an integral
    13:00 Conservative forces and potential energy
    13:46 Deriving Hooke’s Law from elastic potential energy
    14:22 Deriving the force of gravity from gravitational potential energy
    15:17 Neutral, stable, and unstable equilibrium

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    AP Physics C Review Website

    Next Video: AP Physics C: Integrals in Kinematics Review (Mechanics)

    Previous Video: AP Physics C: Dynamics Review (Mechanics)

    Please support me on Patreon!

    Thank you to Aarti Sangwan for being my Quality Control help.



    AP Physics C: Work, Energy, and Power Review (Mechanics)

  8. Name: AP Physics C: Dynamics Review (Mechanics)
    Category: Dynamics
    Date Added: 2017-03-23
    Submitter: Flipping Physics

    Calculus based review of Newton’s three laws, basic forces in dynamics such as the force of gravity, force normal, force of tension, force applied, force of friction, free body diagrams, translational equilibrium, the drag or resistive force and terminal velocity. For the calculus based AP Physics C mechanics exam.
    Want Lecture Notes?

    Content Times:
    0:18 Newton’s First Law
    1:30 Newton’s Second Law
    1:55 Newton’s Third Law
    2:29 Force of Gravity
    3:36 Force Normal
    3:58 Force of Tension
    4:24 Force Applied
    4:33 Force of Friction
    5:46 Static Friction
    6:17 Kinetic Friction
    6:33 The Coefficient of Friction
    7:26 Free Body Diagrams
    10:41 Translational equilibrium
    11:41 Drag Force or Resistive Force
    13:25 Terminal Velocity

    Next Video: AP Physics C: Work, Energy, and Power Review (Mechanics)

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    AP Physics C Review Website

    Previous Video: AP Physics C: Kinematics Review (Mechanics)

    Please support me on Patreon!

    Thank you to Aarti Sangwan for being my Quality Control help.



    AP Physics C: Dynamics Review (Mechanics)

  9. Name: AP Physics C: Kinematics Review (Mechanics)
    Category: Kinematics
    Date Added: 2017-03-16
    Submitter: Flipping Physics

    Review of conversions, velocity, acceleration, instantaneous and average velocity and acceleration, uniformly accelerated motion, free fall and free fall graphs, component vectors, vector addition, unit vectors, relative velocity and projectile motion. For the calculus based AP Physics C mechanics exam.
    Want Lecture Notes?

    Content Times:
    0:12 Introductory Concepts
    2:07 Velocity and Acceleration
    3:03 Uniformly Accelerated Motion
    6:51 Free Fall
    7:45 Free Fall Graphs
    9:16 Component Vectors
    10:58 Unit Vectors
    13:09 Relative Velocity
    13:51 Projectile Motion

    Next Video: AP Physics C: Dynamics Review (Mechanics)

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    AP Physics C Review Websitel

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    Thank you to my Quality Control help: Jen Larsen, Scott Carter, Natasha Trousdale and Aarti Sangwan



    AP Physics C: Kinematics Review (Mechanics)

  10. Name: 2D Conservation of Momentum Example using Air Hockey Discs
    Category: Momentum and Collisions
    Date Added: 2017-05-21
    Submitter: Flipping Physics

    A 28.8 g yellow air hockey disc elastically strikes a 26.9 g stationary red air hockey disc. If the velocity of the yellow disc before the collision is 33.6 cm/s in the x direction and after the collision it is 10.7 cm/s at an angle 63.4° S of E, what is the velocity of the red disc after the collision? This is an AP Physics 1 topic. Want Lecture Notes?

    Content Times:
    0:12 The problem
    1:49 Breaking the initial velocity of disc 1 into its components
    3:06 Conservation of momentum in the x-direction
    5:24 Conservation of momentum in the y-direction
    6:26 Solving for the final velocity of disc 2 using its components
    8:40 Was this an elastic collision?
    12:39 Movie Character Day!

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    Next Video: Introduction to Circular Motion and Arc Length

    Previous Video: Review of Mechanical Energy and Momentum Equations and When To Use Them!

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    Thank you to my Quality Control help: Christopher Becke, Scott Carter and Jennifer Larsen

    "Nombre de los vientos". Licensed under Public domain via Wikimedia Commons -

     



    2D Conservation of Momentum Example using Air Hockey Discs

  11. Name: Review of Mechanical Energy and Momentum Equations and When To Use Them!
    Category: Momentum and Collisions
    Date Added: 2017-02-16
    Submitter: Flipping Physics

    By the time students learn about all the equations for mechanical energy, momentum, impulse and impact force, they often start to confuse the equations with one another. This is a straightforward, simple look at all of those equations and when to use them.
    This is an AP Physics 1 Topic. Want Lecture Notes?

    Content Times:
    0:14 Tacky Sweater Day!
    0:22 Conservation of Mechanical Energy
    0:54 Work due to Friction equals Change in Mechanical Energy
    1:30 Net Work equals change in Kinetic Energy
    3:01 Conservation of Momentum does NOT require the work due to friction to be zero
    3:28 The initial and final points when dealing with momentum are predetermined
    3:56 Impulse does not equal Impact Force

    Thank you to Sophie Jones and her family for letting me use six of their sweaters in this video!

    Next Video: 2D Conservation of Momentum Example using Air Hockey Discs

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    Previous Video: Impulse Comparison of Three Different Demonstrations

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    Thank you to my Quality Control help: Christopher Becke, Scott Carter and Jennifer Larsen



    Review of Mechanical Energy and Momentum Equations and When To Use Them!

  12. Name: Impulse Comparison of Three Different Demonstrations
    Category: Momentum and Collisions
    Date Added: 2017-02-09
    Submitter: Flipping Physics

    A racquetball is dropped on to three different substances from the same height above each: water, soil, and wood. Rank the _______ during the collision with each substance in order from least to most. (a) Impulse. (b) Average Force of Impact. (Assume the racquetball stops during the collision with the water and soil.)

    This is an AP Physics 1 Topic. Want Lecture Notes?

    Content Times:
    0:11 Prom Dress Day!
    0:20 The three demonstrations
    0:32 The problem
    1:43 The equation for Impulse and Impact Force
    2:02 Understanding the two parts to the demonstrations
    3:33 Part (a): Impulse [water and soil]
    4:47 Part (a): Impulse [wood]
    5:23 Part (b): Impact Force [water and soil]
    6:27 Part (b): Impact Force [wood]
    7:59 The Ann Arbor Prom Dress Project

    Thank you to Jan Wery and Judi Lintott of the Ann Arbor Prom Dress Project: “Find your dream dress for less than $25."

    Next Video: Review of Mechanical Energy and Momentum Equations and When To Use Them!

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    Previous Video: Using Impulse to Calculate Initial Height

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    Impulse Comparison of Three Different Demonstrations

  13. Name: Using Impulse to Calculate Initial Height
    Category: Momentum and Collisions
    Date Added: 2017-02-03
    Submitter: Flipping Physics

     

    A 66 g beanbag is dropped and stops upon impact with the ground. If the impulse measured during the collision is 0.33 N·s, from what height above the ground was the beanbag dropped?

    This is an AP Physics 1 Topic. Want Lecture Notes?

    Content Times:
    0:12 Superhero Day!
    0:56 The problem
    1:39 Splitting the problem in to two parts
    2:32 Using Impulse for part 2
    3:30 Using Conservation of Energy for part 1
    4:45 What went wrong?

    Next Video: Impulse Comparison of Three Different Demonstrations

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    Previous Video: Review of Momentum, Impact Force, and Impulse

    Thanks to Adam Herz for letting me borrow a VHS copy of our high school video yearbook which he was instrumental in the creating of.

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    Thank you to my Quality Control help: Christopher Becke and Jennifer Larsen

     



    Using Impulse to Calculate Initial Height

  14. Name: You Can't Run From Momentum! (a momentum introduction)
    Category: Momentum and Collisions
    Date Added: 2017-01-12
    Submitter: Flipping Physics

    Two kids walk through the woods discussing momentum. I mean, who wouldn’t?

    Okay, fine. It’s a basic introduction to the concept of momentum.
    Want Lecture Notes? This is an AP Physics 1 Topic.

    Next Video: Force of Impact Equation Derivation
    http://www.flippingphysics.com/impact-force.html

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    Previous Video: Instantaneous Power Delivered by a Car Engine - Example Problem

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    You Can't Run From Momentum! (a momentum introduction)

  15. Name: Review of Momentum, Impact Force, and Impulse
    Category: Momentum and Collisions
    Date Added: 2017-01-26
    Submitter: Flipping Physics

    An important review highlighting differences between the equations for Conservation of Momentum, Impact Force and Impulse.
    Want lecture notes? This is an AP Physics 1 Topic.

    Content Times:
    0:17 Conservation of Momentum
    1:01 An explosion is a collision in reverse
    1:22 Impact Force
    1:39 Impulse
    2:16 Impulse equals 3 things
    2:53 How many objects are in these equations?

    A big THANK YOU to Elle Konrad who let me borrow several of her old dance costumes!

    Next Video: Using Impulse to Calculate Initial Height

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    Previous Video: Demonstrating How Helmets Affect Impulse and Impact Force

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    Thank you to my Quality Control help: Christopher Becke, Scott Carter and Jennifer Larsen



    Review of Momentum, Impact Force, and Impulse

  16. Name: Demonstrating How Helmets Affect Impulse and Impact Force
    Category: Momentum and Collisions
    Date Added: 2016-12-08
    Submitter: Flipping Physics

    Demonstrating and measuring how a helmet changes impulse, impact force and change in time during a collision.
    Want lecture notes? This is an AP Physics 1 Topic.

    Content Times:
    0:21 The demonstration without a helmet
    1:15 The equation for Impulse
    1:55 How a helmet should affect the variables
    2:36 The demonstration with a helmet
    3:29 Comparing with and without a helmet

    Next Video: Review of Momentum, Impact Force, and Impulse

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    Previous Video: Demonstrating Impulse is Area Under the Curve

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    Thank you to my Quality Control help: Christopher Becke, Scott Carter, and Jennifer Larsen



    Demonstrating How Helmets Affect Impulse and Impact Force

  17. Name: Demonstrating Impulse is Area Under the Curve
    Category: Momentum and Collisions
    Date Added: 2016-12-01
    Submitter: Flipping Physics

    Demonstrating, measuring and showing Impulse is Area Under the Force vs. Time Curve.

    Want lecture notes? This is an AP Physics 1 Topic.

     

    Content Times:

    0:09 Deriving the Impulse Equation using algebra

    0:47 Deriving the Impulse Equation using calculus

    2:08 The demonstration

    2:42 Illustrating “area under the curve”

     

    Next Video: Demonstrating How Helmets Affect Impulse and Impact Force

     

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    Previous Video: Introductory Elastic Collision Problem Demonstration

     

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    Thank you to my Quality Control help: Christopher Becke, Scott Carter, and Jennifer Larsen



    Demonstrating Impulse is Area Under the Curve

  18. Name: Introductory Elastic Collision Problem Demonstration
    Category: Momentum and Collisions
    Date Added: 2016-11-24
    Submitter: Flipping Physics

    An elastic collision is demonstrated and analyzed. Want lecture notes?
    This is an AP Physics 1 Topic. A big thank you to Mr. Becke for being a guest in today’s video!

    Content Times:
    0:25 Reading and translating the problem
    1:17 The demonstration
    1:52 Solving for velocity final of cart 2
    3:46 Measuring the velocity final of cart 2
    4:25 Checking if kinetic energy is conserved
    6:22 We should have converted to meters per second

    Next Video: Demonstrating Impulse is Area Under the Curve

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    Previous Video: Introductory Perfectly Inelastic Collision Problem Demonstration

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    Introductory Elastic Collision Problem Demonstration

  19. Name: Introductory Perfectly Inelastic Collision Problem Demonstration
    Category: Momentum and Collisions
    Date Added: 2016-11-17
    Submitter: Flipping Physics

    A perfectly inelastic collision is demonstrated and analyzed.

    Want lecture notes?

    This is an AP Physics 1 Topic.

     

    Content Times:

    0:08 Demonstrating the Perfectly Inelastic Collision

    0:41 Known values

    1:34 Using Conservation of Momentum

    2:22 Both objects have the same final velocity

    3:37 Measuring the final velocity

    4:05 Determining the relative error

    4:45 Fruit Day!

     

    Next Video: Introductory Elastic Collision Problem Demonstration

     

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    Previous Video: Introduction to Elastic and Inelastic Collisions

     

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    • Christopher Becke
    • Scott Carter


    Introductory Perfectly Inelastic Collision Problem Demonstration

  20. Name: Introduction to Elastic and Inelastic Collisions
    Category: Momentum and Collisions
    Date Added: 2016-11-10
    Submitter: Flipping Physics

    Learn about Elastic, Inelastic and Perfectly Inelastic collisions via a demonstration
    Want lecture notes?
    This is an AP Physics 1 Topic.

    Content Times:
    0:15 The charities
    1:05 Elastic collisions
    2:09 Inelastic collisions
    3:29 Perfectly Inelastic collisions
    4:13 Demonstration #1
    5:28 Demonstration #2

    Next Video: Introductory Perfectly Inelastic Collision Problem Demonstration

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    Previous Video: Introductory Conservation of Momentum Explosion Problem Demonstration

    The Charities:
    Children With Hair Loss
    Alpha House
    Home Of New Vision
    American Foundation for Suicide Prevention

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    Introduction to Elastic and Inelastic Collisions

  21. Name: Introductory Conservation of Momentum Explosion Problem Demonstration
    Category: Momentum and Collisions
    Date Added: 2016-10-13
    Submitter: Flipping Physics

    Now that we have learned about conservation of momentum, let’s apply what we have learned to an “explosion”. Okay, it’s really just the nerd-a-pult launching a ball while on momentum carts.
    Want lecture notes?
    This is an AP Physics 1 Topic.

    Content Times:
    0:38 The demonstration
    1:16 The known values
    2:07 Solving the problem using conservation of momentum
    4:00 Measuring the final velocity of the nerd-a-pult
    4:39 Determining relative error
    5:09 What happens with a less massive projectile?

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    Previous Video: Introduction to Conservation of Momentum with Demonstrations

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    Introductory Conservation of Momentum Explosion Problem Demonstration

  22. Name: Introduction to Conservation of Momentum with Demonstrations
    Category: Momentum and Collisions
    Date Added: 2016-10-13
    Submitter: Flipping Physics

    Demonstrations of and Introduction to Conservation of Momentum
    Want lecture notes?
    This is an AP Physics 1 Topic.

    Content Times:
    0:10 Deriving Conservation of Momentum
    1:33 Demonstrating Conservation of Momentum
    1:53 Analyzing the demonstration
    3:29 How a rocket works

    Next Video: Introductory Conservation of Momentum Explosion Problem Demonstration

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    Introduction to Conservation of Momentum with Demonstrations

  23. Name: Proving and Explaining Impulse Approximation
    Category: Momentum and Collisions
    Date Added: 2016-09-22
    Submitter: Flipping Physics

    Know when and how to use the “Impulse Approximation”.
    Want lecture notes?

    This is an AP Physics 1 Topic.

    Content Times:
    0:12 Reviewing the examples
    0:43 Defining Impulse Approximation
    1:41 Determining the forces during the collision
    2:27 Solving for the Force Normal (or Force of Impact)
    3:12 Determining our error

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    Previous Video: Impulse Introduction or If You Don't Bend Your Knees When Stepping off a Wall

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    Proving and Explaining Impulse Approximation

  24. Name: Impulse Introduction or If You Don't Bend Your Knees When Stepping off a Wall
    Category: Momentum and Collisions
    Date Added: 2016-09-22
    Submitter: Flipping Physics

    Now mr.p doesn’t bend his knees when stepping off a wall. What is the new force of impact?

    Want lecture notes? This is an AP Physics 1 Topic.

    Content Times:
    0:18 How much does mr.p bend his knees?
    1:00 Reviewing the previous problem
    1:57 What changes if I don’t bend my knees?
    2:41 Impulse introduction
    3:36 The impulse during this collision
    4:51 Why is it bad to not bend your knees?
    5:22 Estimating time of collision if I don’t bend my knees
    6:09 Solving for the force of impact
    6:51 Review
    7:28 No tomatoes were wasted in the making of this video

    Next Video: Proving and Explaining Impulse Approximation

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    Previous Video: Calculating the Force of Impact when Stepping off a Wall

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    Impulse Introduction or If You Don't Bend Your Knees When Stepping off a Wall

  25. Name: Calculating the Force of Impact when Stepping off a Wall
    Category: Momentum and Collisions
    Date Added: 2016-09-08
    Submitter: Flipping Physics

    A 73 kg mr.p steps off a 73.2 cm high wall. If mr.p bends his knees such that he stops his downward motion and the time during the collision is 0.28 seconds, what is the force of impact caused by the ground on mr.p? Want lecture notes? This is an AP Physics 1 Topic.

    Content Times:
    0:21 Translating the problem
    1:32 Splitting the problem into parts
    3:07 Substituting in known variables
    4:30 Finding the final velocity for part 1
    6:21 Substituting back into Force of Impact equation
    7:23 Converting to pounds

    Next Video: Impulse Introduction or If You Don't Bend Your Knees When Stepping off a Wall

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    Calculating the Force of Impact when Stepping off a Wall

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