timestamps

• 0:00

  Introduction to 2018 FRQs

• 0:32

  Topics for Spacecraft Orbit

• 1:36

  Forces on Spacecraft

• 2:42

  Gravity as Centripetal Force

• 3:46

  Deriving Without Gravity Knowledge

• 4:50

  Deriving Orbital Period

• 5:55

  Newton's Laws and Gravity

• 6:59

  Simplifying Equations

• 8:12

  Velocity and Circumference

• 9:16

  Final Period Equation

• 10:20

  Period with Double Mass

• 11:59

  Period Independence from Mass

• 13:03

  Speed in Larger Orbit

• 14:38

  Inverse Relationship Explanation

• 16:24

  Exam Format Discussion

• 18:59

  Rotation Disc Introduction

• 20:34

  Angular Velocity Graph

• 23:42

  Constant Torque and Acceleration

• 25:47

  Deriving Rotational Inertia

• 28:35

  Angular Momentum Approach

• 30:41

  Oil Dripping Experiment

• 32:57

  Velocity Graph with Oil

• 35:04

  Acceleration Graph Changes

• 37:41

  Concave Up Explanation

• 39:14

  Modeling Equations Analysis

• 43:18

  Torque Decrease Reasoning

• 45:31

  Springs and Blocks Setup

• 48:07

  Period Ratio Calculation

• 51:15

  Amplitude After Collision

• 53:52

  Inelastic Collision Energy Loss

• 57:00

  Mathematical Amplitude Derivation

• 1:01:12

  Wrapping Up and Questions