Demonstrating when a pendulum is in simple harmonic motion. Want Lecture Notes? This is an AP Physics 1 topic.

Content Times:

0:09 Reviewing simple harmonic motion

0:24 Showing a pendulum in simple harmonic motion

1:47 Velocities in simple harmonic motion

2:15 Accelerations in simple harmonic motion

2:57 A pendulum’s restoring force

5:07 A maximum of 15°

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]]>Demonstrating the difference between vertical and horizontal mass-spring systems. Want Lecture Notes? This is an AP Physics 1 topic.

Content Times:

0:12 The impossible frictionless, horizontal mass-spring system

0:44 It’s actually a vertical mass-spring system rotated 90 degrees

1:01 Similarities between horizontal and vertical mass-spring systems

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Previous Video: Simple Harmonic Motion - Force, Acceleration, and Velocity at 3 Positions

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]]>Identifying the spring force, acceleration, and velocity at the end positions and equilibrium position of simple harmonic motion. Amplitude is also defined and shown. Want Lecture Notes? This is an AP Physics 1 topic.

Content Times:

0:01 Identifying the 3 positions

0:43 Velocity

1:43 Spring Force

2:14 Amplitude

2:30 Acceleration

3:22 Velocity at position 2

4:12 Is simple harmonic motion also uniformly accelerated motion?

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Previous Video: Simple Harmonic Motion Introduction via a Horizontal Mass-Spring System

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]]>Simple Harmonic Motion is introduced and demonstrated using a horizontal mass-spring system. Want Lecture Notes? This is an AP Physics 1 topic.

Content Times:

0:01 A horizontal mass-spring system

0:29 Equilibrium position and positions 1, 2, and 3

2:05 Demonstrating simple harmonic motion

2:53 Requirements for simple harmonic motion

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]]>A horizontal spring is attached to a cord, the cord goes over a pulley, and a 0.025 kg mass is attached to the cord. If the spring is stretched by 0.045 m, what is the spring constant of the spring?

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

Content Times:

0:07 Translating the problem

0:39 Solving the problem

2:26 Comparing to a vertical spring

3:30 Expansion vs. compression springs

3:56 The human spine acts like a compression spring

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]]>A vertically hanging spring with a natural length of 5.4 cm is extended to a length of 11.4 cm when 25 grams is suspended from it. What is the spring constant of the spring?

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

Content Times:

0:08 Translating the problem

0:54 The free body diagram

1:53 Understanding the direction of the Spring Force

2:46 Summing the forces

3:32 Common misconception when using Hooke’s Law equation

5:00 Using the magnitude of the displacement from equilibrium

Next Video: The Human Spine acts like a Compression Spring

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Previous Video: Hooke's Law Introduction - Force of a Spring

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]]>Hooke’s law is demonstrated and graphed. Spring constant, displacement from equilibrium position, and restoring force are defined and demonstrated.

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

Content Times:

0:01 Robert Hooke

0:46 Compressing a spring using a force sensor

1:33 Graphing force as a function of position

2:14 Hooke’s Law

3:07 Demonstrating displacement from rest position

5:20 Demonstrating the spring constant

6:15 What the negative in Hooke’s Law means

7:02 The spring constant is positive

7:54 The restoring force

8:33 Elastic limit

Next Video: Determining the Spring Constant, k, with a Vertically Hanging Mass

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]]>Calculus is used to determine the force of gravity and the gravitational potential energy between an object and a planet, inside and outside the planet. Equations and graphs are determined and discussed. Want Lecture Notes? This is an AP Physics C: Mechanics topic.

Content Times:

0:01 Basic universal gravitation equations

1:07 Outside the planet

1:42 Assumptions for inside the planet

3:38 Deriving mass inside r

4:23 Determining the equation for force of gravity inside the planet

5:24 Graphing the force of gravity inside the planet

5:59 Determining the equation for universal gravitational potential energy inside the planet

7:37 Solving for the constant C

8:49 The equation for universal gravitational potential energy inside the planet

9:41 Looking over the graphs

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]]>In a universe devoid of anything else, two identical spheres of mass, m, and radius, R, are released from rest when they have a distance between their centers of mass of X. Find the magnitude of the impulse delivered to each sphere until just before they make contact. Want Lecture Notes? This is an AP Physics 1 topic.

Content Times:

0:07 Translating the problem

1:26 Applicable impulse equations

2:13 Conservation of mechanical energy

3:28 Showing a common mistake

4:00 Solving the problem

Next Video: Force of Gravity and Gravitational Potential Energy Functions from Zero to Infinity (but not beyond)

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Previous Video: Mechanical Energy of a Satellite in Circular Orbit

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]]>
The mechanical energy of a satellite in circular orbit is solved for in terms of universal gravitational potential energy. And the velocity of the satellite is compared to escape velocity.

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

Content Times:

0:14 Types of mechanical energy of a satellite

1:21 Solving for the velocity of a satellite in circular orbit

2:34 Solving for the mechanical energy of a satellite

3:31 Comparing satellite velocity to escape velocity

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Previous Video: Deriving Escape Velocity of Planet Earth

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