ap physics 1 - q&a: work, energy & power

timestamps

• 0:00

  Introduction to Work Concepts

• 0:31

  Motivating Energy and Work

• 1:04

  Man Pulling Box Example

• 1:35

  Work Over Distance and Angle

• 2:09

  Trig Functions Overview

• 2:39

  Cosine Graph Explanation

• 3:12

  Sine Graph and Work Equation

• 3:42

  Proportionality to Force and Distance

• 4:12

  Angle Effects on Work

• 4:44

  Cosine Theta in Work Formula

• 5:16

  Vector Components Diagram

• 5:48

  Non-Constant Force Introduction

• 6:20

  Linear Force Approximation

• 6:51

  Riemann Sum for Work

• 7:56

  Summation Notation

• 8:58

  Area Under Force Curve

• 9:59

  Work-Energy Theorem

• 10:32

  Net Force and Kinetic Energy

• 11:35

  Constant Mass Assumption

• 12:38

  Acceleration Substitution

• 13:40

  Displacement Expression

• 14:41

  Cancellations and Momentum

• 15:44

  P vs V Graph Area

• 16:45

  Kinetic Energy Derivation

• 17:48

  Initial Kinetic Energy Term

• 18:51

  Energy Conservation Argument

• 19:53

  Potential Energy Changes

• 20:57

  Force from Potential Slope

• 22:04

  Total Change in Potential

• 23:07

  Holding Box Work Example

• 24:09

  Zero Work Intuition

• 25:12

  Muscle Contraction Explanation

• 26:15

  Neuron Ion Channels

• 27:20

  Electric Current in Muscles

• 28:21

  Spring Model for Channels

• 29:22

  Elastic Potential Energy

• 30:25

  Body Energy Supply

• 31:30

  Circular Motion Introduction

• 32:39

  Normal Force Components

• 33:41

  Sine Theta in Force

• 35:17

  Perpendicular Force and Velocity

• 36:20

  Zero Work in Circle

• 36:50

  Planet Orbit Example

• 37:54

  Half Revolution Work

• 39:28

  Power Introduction

• 40:34

  Calories in Apple Analogy

• 41:35

  Average Power Calculation

• 42:38

  Instantaneous Power Slope

• 44:11

  Tangent Line Slope

• 45:46

  Zero Power Holding Box

• 46:48

  Power Equation Derivation

• 47:53

  F V Cosine Theta Formula

• 48:55

  Power in Orbital Motion

• 49:30

  Conclusion and Contact Info