# APlusPhysics Forums

Showing files and videos posted in the last 365 days.

1. Last week
2. ## Introductory Angular Velocity Problem - A Turning Bike Tire

The wheel of a bike rotates exactly 3 times in 12.2 seconds. What is the average angular velocity of the wheel in (a) radians per second and (b) revolutions per minute? Want Lecture Notes? This is an AP Physics 1 topic. Content Times: 0:08 Translating the problem 1:32 Solving for the angular velocity in radians per second 2:22 Converting from radians per second to revolutions per minute 3:24 Three common mistakes made by students when doing this conversion. 4:37 Alternate and easier solution for part b Multilingual? Please help translate Flipping Physics videos! Previous Video: Angular Velocity Introduction Please support me on Patreon! Thank you to Scott Carter and Christopher Becke for being my Quality Control team for this video.
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4. ## Angular Velocity Introduction

The equation for average angular velocity is presented in relation to the equation for average linear velocity. Radians per second and revolutions per minute are discusses as the units for angular velocity. Objects which have angular velocity are shows. Want Lecture Notes? This is an AP Physics 1 topic. Content Times: 0:09 Average linear velocity 0:22 Average angular velocity 0:53 The units for angular velocity 1:37 Examples of objects with angular velocity Multilingual? Please help translate Flipping Physics videos! Next Video: Introductory Angular Velocity Problem - A Turning Bike Tire Previous Video: Introductory Arc Length Problem - Gum on a Bike Tire Please support me on Patreon! Thank you to Scott Carter and Christopher Becke for being my Quality Control team for this video.
5. ## Introductory Arc Length Problem - Gum on a Bike Tire

How far does a piece of gum stuck to the outside of a 67 cm diameter wheel travel while the wheel rotates through 149°? A conversion from revolutions to degrees is performed. Want Lecture Notes? This is an AP Physics 1 topic. Content Times: 0:11 Reading, visualizing, and translating the problem 1:22 Solving the problem 1:51 Converting from revolutions to radians 3:09 Measuring our answer Multilingual? Please help translate Flipping Physics videos! Next Video: Angular Velocity Introduction Previous Video: Defining Pi for Physics Please support me on Patreon! Thank you to Aarti Sangwan and Christopher Becke for being my Quality Control team for this video.

7. ## Introduction to Circular Motion and Arc Length

Cartesian and polar coordinates are introduced and how to switch from one to the other is derived. The concept of angular displacement and arc length are demonstrated. Circumference is shown to be an arc length. Want Lecture Notes? This is an AP Physics 1 topic. Content Times: 0:10 Cartesian coordinates and circular motion 1:00 Polar coordinates and circular motion 1:40 Switching between polar and Cartesian coordinates 2:18 Introduction to Angular Displacement and Arc Length 3:24 The Arc Length equation 4:13 Circumference and Arc Length Multilingual? Please help translate Flipping Physics videos! Next Video: Defining Pi for Physics Previous Video: 2D Conservation of Momentum Example using Air Hockey Discs Please support me on Patreon! Thank you to Aarti Sangwan and Christopher Becke for being my Quality Control team for this video.
8. ## AP Physics C: Equations to Memorize (Mechanics)

Calculus based review of equations I suggest you memorize for the AP Physics C: Mechanics Exam. Please realize I abhor memorization, however, there are a few equations which I do recommend you memorize. I also list equations NOT to memorize and ones which I suggest you know how to derive. Also a note about Moments of Inertia and the AP Exam. For the calculus based AP Physics C mechanics exam. Want Lecture Notes? Content Times: 0:22 Equations to Memorize 2:06 Derivative as an Integral Example 6:52 Equations NOT to memorize 8:10 Equations to know how to derive 10:14 Moments of Inertia and the AP Exam Multilingual? Please help translate Flipping Physics videos! AP Physics C Review Website Previous Video: AP Physics C: Simple Harmonic Motion Review (Mechanics) Please support me on Patreon! Thank you to Aarti Sangwan, Sawdog, Romail Pervez Bhatti, and Lisa Greene for being my Quality Control team for this video.
9. ## AP Physics C: Simple Harmonic Motion Review (Mechanics)

Calculus based review of Simple Harmonic Motion (SHM). SHM is defined. A horizontal mass-spring system is analyzed and proven to be in SHM and it’s period is derived. The difference between frequency and angular frequency is shown. The equations and graphs of position, velocity, and acceleration as a function of time are analyzed. the phase constant Phi is explained. And Conservation of Mechanical Energy in SHM is discussed. For the calculus based AP Physics C mechanics exam. Want Lecture Notes? Content Times: 0:12 Defining simple harmonic motion (SHM) 0:53 Analyzing the horizontal mass-spring system 2:26 Proving a horizontal mass-spring system is in SHM 3:38 Solving for the period of a mass-spring system in SHM 4:39 Are frequency and angular frequency the same thing? 5:16 Position as a function of time in SHM 5:44 Explaining the phase constant Phi 6:19 Deriving velocity as a function of time in SHM 7:33 Deriving acceleration as a function of time in SHM 9:05 Understanding the graphs of position, velocity, and acceleration as a function of time in SHM 12:16 Conservation of Mechanical Energy in SHM Multilingual? Please help translate Flipping Physics videos! AP Physics C Review Website Next Video: AP Physics C: Equations to Memorize (Mechanics) Previous Video: AP Physics C: Universal Gravitation Review (Mechanics) Please support me on Patreon! Thank you to Sawdog for being my Quality Control individual for this video.
10. ## AP Physics C: Universal Gravitation Review (Mechanics)

Calculus based review of Universal Gravitation including Newton’s Universal Law of Gravitation, solving for the acceleration due to gravity in a constant gravitational field, universal gravitational potential energy, graphing universal gravitational potential energy between an object and the Earth, three example problems (binding energy, escape velocity and orbital energy), and Kepler’s three laws. For the calculus based AP Physics C mechanics exam. Want Lecture Notes? Content Times: 0:10 Newton’s Universal Law of Gravitation 1:52 Solving for the acceleration due to gravity 2:02 Universal Gravitational Potential Energy 4:52 Graph of Universal Gravitational Potential Energy between an object and the Earth 6:09 Binding Energy Example Problem 8:22 Escape Velocity Example Problem 9:54 Orbital Energy Example Problem 12:29 Kepler’s Three Laws 12:54 Kepler’s First Law 14:56 Kepler’s Second Law 15:25 Deriving Kepler’s Third Law Multilingual? Please help translate Flipping Physics videos! AP Physics C Review Website Next Video: AP Physics C: Simple Harmonic Motion Review (Mechanics) Previous Video: AP Physics C: Rotational vs. Linear Review (Mechanics) Please support me on Patreon! Thank you to Aarti Sangwan, Sawdog, and Frank Geshwind for being my Quality Control team for this video.
11. ## AP Physics C: Rotational vs. Linear Review (Mechanics)

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 Multilingual? Please help translate Flipping Physics videos! 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) Please support me on Patreon! Thank you to Sawdog for being my Quality Control individual for this video.
12. ## AP Physics C: Rotational Dynamics Review - 2 of 2 (Mechanics)

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? Multilingual? Please help translate Flipping Physics videos! 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) Please support me on Patreon! Thank you to Sawdog for being my Quality Control individual for this video.
13. ## AP Physics C: Rotational Dynamics Review - 1 of 2 (Mechanics)

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 Multilingual? Please help translate Flipping Physics videos! 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) Please support me on Patreon! Thank you to Sawdog for being my Quality Control individual for this video.
14. ## AP Physics C: Rotational Kinematics Review (Mechanics)

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 Multilingual? Please help translate Flipping Physics videos! 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) Please support me on Patreon! Thank you to Natasha Trousdale, Aarti Sangwan, and Jen Larson for being my Quality Control team for this video.
15. ## AP Physics C: Momentum, Impulse, Collisions and Center of Mass Review (Mechanics)

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 Multilingual? Please help translate Flipping Physics videos! AP Physics C Review Website Next Video: AP Physics C: Rotational Kinematics Review (Mechanics) Previous Video: AP Physics C: Integrals in Kinematics Review (Mechanics) Please support me on Patreon! Thank you to Aarti Sangwan, Jordan Bueno, and Michael Nelson for being my Quality Control team for this video.
16. ## AP Physics C: Integrals in Kinematics Review (Mechanics)

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. Multilingual? Please help translate Flipping Physics videos! 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) Please support me on Patreon! Thank you to Mark Kramer and Aarti Sangwan for being my Quality Control team.
17. ## AP Physics C: Work, Energy, and Power Review (Mechanics)

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 Multilingual? Please help translate Flipping Physics videos! 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.
18. ## AP Physics C: Dynamics Review (Mechanics)

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) Multilingual? Please help translate Flipping Physics videos! 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.
19. ## AP Physics C: Kinematics Review (Mechanics)

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) Multilingual? Please help translate Flipping Physics videos! AP Physics C Review Websitel Please support me on Patreon! Thank you to my Quality Control help: Jen Larsen, Scott Carter, Natasha Trousdale and Aarti Sangwan
20. ## 2D Conservation of Momentum Example using Air Hockey Discs

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! Multilingual? Please help translate Flipping Physics videos! Next Video: Introduction to Circular Motion and Arc Length Previous Video: Review of Mechanical Energy and Momentum Equations and When To Use Them! Please support me on Patreon! 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 -
21. ## The AP Physics C Companion - Mechanics

Version 1.0.1

\$10.00

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

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 Multilingual? Please help translate Flipping Physics videos! Previous Video: Impulse Comparison of Three Different Demonstrations Please support me on Patreon! Thank you to my Quality Control help: Christopher Becke, Scott Carter and Jennifer Larsen
23. ## Mechanical Universe: The Millikan Experiment (12)

Episode 12. The Millikan Experiment: A dramatic recreation of Millikan's classic oil-drop experiment to determine the charge of a single electron.“The Mechanical Universe,” is a critically-acclaimed series of 52 thirty-minute videos covering the basic topics of an introductory university physics course.Each program in the series opens and closes with Caltech Professor David Goodstein providing philosophical, historical and often humorous insight into the subject at hand while lecturing to his freshman physics class. The series contains hundreds of computer animation segments, created by Dr. James F. Blinn, as the primary tool of instruction. Dynamic location footage and historical re-creations are also used to stress the fact that science is a human endeavor. The series was originally produced as a broadcast telecourse in 1985 by Caltech and Intelecom, Inc. with program funding from the Annenberg/CPB Project.The online version of the series is sponsored by the Information Science and Technology initiative at Caltech. http://ist.caltech.edu©1985 California Institute of Technology, The Corporation for Community College Television, and The Annenberg/CPB Project
24. ## Impulse Comparison of Three Different Demonstrations

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! Multilingual? Please help translate Flipping Physics videos! Previous Video: Using Impulse to Calculate Initial Height Please support me on Patreon! Thank you to my Quality Control help: Scott Carter and Jennifer Larsen
25. ## Using Impulse to Calculate Initial Height

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 Multilingual? Please help translate Flipping Physics videos! 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. Please support me on Patreon! Thank you to my Quality Control help: Christopher Becke and Jennifer Larsen
26. ## You Can't Run From Momentum! (a momentum introduction)

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 Multilingual? Please help translate Flipping Physics videos! Previous Video: Instantaneous Power Delivered by a Car Engine - Example Problem Please support me on Patreon! Please consider becoming a Flipping Physics Quality Control helper.
27. ## Review of Momentum, Impact Force, and Impulse

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 Multilingual? Please help translate Flipping Physics videos! Previous Video: Demonstrating How Helmets Affect Impulse and Impact Force Please support me on Patreon! Thank you to my Quality Control help: Christopher Becke, Scott Carter and Jennifer Larsen