ap physics 1 - 2019 frq: rotational motion & torque

timestamps

• 0:00

  Elevator Forces Introduction

• 0:32

  Forces in Elevator

• 1:03

  Gravity and Normal Force

• 3:10

  Feeling Weightless

• 5:21

  Accelerating Upwards

• 6:24

  No Acceleration Case

• 6:55

  Accelerating Downwards

• 7:25

  Example Calculation

• 9:30

  Elevator Questions

• 10:02

  2019 FRQ Overview

• 10:33

  Question 1 Setup

• 12:37

  Speed Graph Sketch

• 14:42

  External Forces Analysis

• 15:44

  Graph Explanation

• 17:30

  Part A Scoring

• 21:31

  Part B Sphere Momentum

• 22:36

  Torque on Sphere

• 23:42

  Friction vs Plunger

• 25:27

  Torque Reasoning

• 28:56

  Question 2 Introduction

• 29:26

  Qualitative Quantitative

• 30:58

  Mass A Larger

• 35:00

  Mass A Smaller

• 37:41

  Free Body Diagrams

• 42:59

  Derive Acceleration Equations

• 47:22

  Support for Small Mass

• 49:42

  Heavy Pulley Effect

• 54:08

  Pulley Derivation

• 56:15

  Tension Comparison

• 58:28

  Session Conclusion