An introduction to Rotational Equilibrium with a review of Translational Equilibrium and demonstrations. Wait there’s more … Static Equilibrium! Want Lecture Notes? This is an AP Physics 1 Topic.

Content Times:

0:07 Reviewing Translational Equilibrium

1:21 Visualizing Translational Equilibrium

2:07 Rotational Equilibrium Introduction

3:09 Visualizing Rotational Equilibrium

4:22 Static Equilibrium

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Previous Video: (2 of 2) Measuring the Rotational Inertia of a Bike Wheel

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]]>1) Calculating if our answer makes sense. 2) Why can’t we sum the torques on everything? 3) Finding the force of tension. Want Lecture Notes? This is an AP Physics 1 Topic.

Content Times:

0:01 Reviewing from last time

1:08 Does it make sense?

2:41 Calculating the fraction

3:41 Sum the torques on everything?

6:07 Solving for force of tension

8:24 Testing our answer

Next Video: Rotational Equilibrium Introduction (and Static Equilibrium too!!)

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Previous Video: (1 of 2) Measuring the Rotational Inertia of a Bike Wheel

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]]>That’s right, we actually measure the rotational inertia of a bicycle wheel. How cool is that? Want Lecture Notes? This is an AP Physics 1 Topic.

Content Times:

0:10 Basic setup

0:44 Free Body Diagram

1:30 Finding net torque

3:10 Finding force of tension

4:51 Linear and angular acceleration

5:42 Uniformly angularly accelerated motion

7:00 What do we need to know?

7:35 Solving the problem

Next Video: (2 of 2) Measuring the Rotational Inertia of a Bike Wheel

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Previous Video: Introductory Rotational Form of Newton's Second Law Problem

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]]>A basic rotational form of Newton’s Second Law problem with only one force. Want Lecture Notes? This is an AP Physics 1 Topic.

Content Times:

0:08 The problem

1:17 Free Body Diagram

1:37 Summing the torques

3:44 The direction

Next Video: (1 of 2) Measuring the Rotational Inertia of a Bike Wheel

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Previous Video: Introductory Rotational Form of Newton's Second Law Problem

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Thank you to Scott Carter, Christopher Becke, Jonathan Everett, and Faiaz Rahman for being my Quality Control Team for this video.

]]>Thank you to Arbor Scientific for letting me borrow their Rotational Inertia Demonstrator to … uh … demonstrate rotational inertia. Want Lecture Notes? This is an AP Physics 1 Topic.

Content Times:

0:22 The Rotational Inertia Demonstrator

0:58 Rotational Inertia

1:40 Demonstration #1

2:00 Demonstration #2

2:55 Why always balanced?

4:30 Demonstration #3

5:27 Demonstration #4

Next Video: Introductory Rotational Form of Newton's Second Law Problem

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Previous Video: Rotational Form of Newton's Second Law - Introduction

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]]>A very basic introduction to the rotational form of Newton’s Second Law of Motion by way of its translational form. Want Lecture Notes? This is an AP Physics 1 Topic.

Content Times:

0:15 Newton’s Second Law

0:48 The rotational form

1:59 Using the equation

3:13 In words

Next Video: Demonstrating Rotational Inertia (or Moment of Inertia)

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Previous Video: Net Torque on a Door Problem

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Three people push on a door. We determine the net torque. Want Lecture Notes? This is an AP Physics 1 Topic.

Content Times:

0:07 Translating the problem

2:00 Solving the problem

3:07 Torque Direction!

Next Video: Rotational Form of Newton's Second Law - Introduction

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Previous Video: The Right Hand Rule for Torque

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]]>The right hand rule for the direction of torque is described and demonstrated six times. Want Lecture Notes?

Content Times:

0:26 The Right Hand Rule

0:47 Demonstration #1

1:27 Demonstration #2

2:37 Demonstration #3

3:20 Demonstration #4

3:40 Demonstration #5

4:24 Demonstration #6

Next Video: Net Torque on a Door Problem

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Previous Video: An Introductory Torque Wrench Problem

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]]>A problem involving forces on a wrench is used to determine the torque exerted by the wrench. A “cheater pipe” is also added.

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

Content Times:

0:07 Translating the problem

2:35 Solving the problem

3:06 Arguing about the angle

4:44 Adding a “Part B”

5:40 Demonstrating the “cheater pipe”

Next Video: The Right Hand Rule for Torque

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Previous Video: Torque Introduction

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]]>Translational and Rotational motion are demonstrated and reviewed. Torque is introduced via the equation and several door opening demonstrations. Moment arm or lever arm is defined and illustrated.

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

Content Times:

0:06 Translational and Rotational Motion

0:58 Defining Torque

1:53 The torque equation

2:59 Door example #1

4:56 Door example #2

6:11 Door example #3

6:58 Defining moment arm

9:18 Torque units

Next Video: An Introductory Torque Wrench Problem

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Previous Video: Moments of Inertia of Rigid Objects with Shape

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