Rotational kinematics and dynamics. For example, arc length, angular velocity, angular acceleration, tangential velocity, tangential acceleration, centripetal acceleration and force, torque, moment of inertia and angular momentum.

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Pi is defined as the ratio of the circumference of a circle to its diameter. A frisbee is used to show the definition of pi. The units for pi, radians, are discussed. The conversion factor between revolutions, degrees, and radians is introduced. Want... Lecture Notes?
This is an AP Physics 1 topic.
Content Times:
0:22 The definition of pi
0:49 Demonstrating the definition of pi
1:35 The units for pi (radians)
2:04 revolutions, degrees, and radians
2:28 Please use rad for radians (not r, that is for radius)
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Next Video: Introductory Arc Length Problem - Gum on a Bike Tire
Previous Video: Introduction to Circular Motion and Arc Length
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Thank you to Aarti Sangwan, Scott Carter, and Christopher Becke for being my Quality Control team for this video.[more]

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 Trans...lating 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
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Thank you to Scott Carter and Christopher Becke for being my Quality Control team for this video.[more]

Angular acceleration is introduced by way of linear acceleration. The units of radians per second squared are discussed. Examples of objects which angular acceleration are shown. Want Lecture Notes?
This is an AP Physics 1 topic.
Content Times:
...0:23 Average angular acceleration
1:02 Angular acceleration units
1:37 Demonstrating objects which have angular acceleration
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Next Video: Angular Accelerations of a Record Player
Previous Video: Introductory Angular Velocity Problem - A Turning Bike Tire
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Thank you to Aarti Sangwan, Scott Carter, and Christopher Becke for being my Quality Control Team for this video.[more]

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
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Next Video: Angular Velocity Introduction
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Thank you to Aarti Sangwan and Christopher Becke for being my Quality Control team for this video.[more]

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 sho...ws.
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
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Next Video: Introductory Angular Velocity Problem - A Turning Bike Tire
Previous Video: Introductory Arc Length Problem - Gum on a Bike Tire
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Thank you to Scott Carter and Christopher Becke for being my Quality Control team for this video.[more]

A record player is plugged in, uniformly accelerates to 45 revolutions per minute, and then is unplugged. The record player (a) takes 0.85 seconds to get up to speed, (b) spends 3.37 seconds at 45 rpms, and then (c) takes 2.32 seconds to slow down to... a stop. What is the average angular acceleration of the record player during all three parts? Want Lecture Notes? This is an AP Physics 1 topic.
Content Times:
0:08 Translating the problem
2:35 Solving part (a) - angular acceleration while speeding up
3:13 Solving part (b) - angular acceleration at a constant angular velocity
3:57 Solving part (c) - angular acceleration while slowing down
4:36 Reflecting on all 3 parts simultaneously
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Next Video: Uniformly Angularly Accelerated Motion Introduction
Previous Video: Angular Acceleration Introduction
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Thank you to Aarti Sangwan, Scott Carter, and Christopher Becke for being my Quality Control Team for this video.[more]

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 Phys...ics 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
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Next Video: Defining Pi for Physics
Previous Video: 2D Conservation of Momentum Example using Air Hockey Discs
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Thank you to Aarti Sangwan and Christopher Becke for being my Quality Control team for this video.[more]

Humans are best for demonstrating Tangential Velocity and understanding that it is not the same as angular velocity.
Want Lecture Notes? This is an AP Physics 1 topic.
Content Times:
0:10 Beginning the demonstration
1:19 Adding the last human
1...:50 What was different for each human?
2:44 Visualizing tangential velocity using an aerial view
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Next Video: Introductory Tangential Velocity Problem - Mints on a Turntable
http://www.flippingphysics.com/tangential-velocity-problem.html
Previous Video: Introductory Uniformly Angularly Accelerated Motion Problem - A CD Player
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Thank you to Christopher Becke and Natasha Trousdale for being my Quality Control Team for this video.[more]

What is the angular acceleration of a compact disc that turns through 3.25 revolutions while it uniformly slows to a stop in 2.27 seconds?Want Lecture Notes?
This is an AP Physics 1 topic.
Content Times:
0:08 Translating the problem
0:52 Determi...ning which Uniformly Angularly Accelerated Motion (UαM) equation to use
1:54 Using a second UαM equation
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Next Video: Human Tangential Velocity Demonstration
Previous Video: Uniformly Angularly Accelerated Motion Introduction
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Thank you to Christopher Becke for being my Quality Control Team for this video.[more]

Using Uniformly Accelerated Motion (UAM) as a framework to learn about Uniformly Angularly Accelerated Motion (UαM). Just like UAM, UαM has 5 variables, 4 equations and if you know 3 of the UαM variables, you can determine the other 2 UαM variables, ...which leaves you with 1 …
Want Lecture Notes? This is an AP Physics 1 topic.
Content Times:
0:15 Introducing Uniformly Angularly Accelerated Motion! (UαM)
0:38 Reviewing Uniformly Accelerated Motion
1:22 When can we use the UαM Equations?
2:24 The four UαM Equations
4:20 Examples of objects in UαM
4:48 Average and instantaneous angular velocity and the UαM equations. Thank you to Scott Carter, and Christopher Becke for being my team for this video. (06:34)[more]

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