Mr Whibley

3.4 Mechanical Systems notes (NCEA Level 3 Physics)

PDF: https://drive.google.com/file/d/1uCtxpzyCAtShWSRFhNVx8ZSB-1cKCEtC Website: https://www.mrwhibley.com/ Support: https://www.buymeacoffee.com/mrwhibley Previous version: https://youtu.be/qBhGLiGjBXM 0:00 Introduction 0:08 Scalars and vectors 0:59 Distance vs displacement 1:34 Speed 2:32 Acceleration 3:45 Equating vectors 5:08 Trigonometry refresher 6:19 Vector components 7:15 Momentum 8:12 Impulse 11:52 Conservation of momentum 13:29 What is an external force? 14:57 DEMONSTRATION: Magnet rifle 15:53 2D Momentum example 17:56 Centre of mass 20:28 Demonstration: Match and forks 21:15 Centre of mass in 2D 22:41 Centre of mass in collisions 23:11 DEMONSTRATION: Air table 25:30 ANALYSIS: Melon fragmentation 26:15 Conservation of energy 28:04 Work 29:54 Power 30:30 Force 32:08 Circular motion 33:07 Centripetal acceleration 35:41 DEMONSTRATION: Spinning tank 36:53 Banked corner 40:48 Newton's law of gravitation 42:06 Orbital motion 43:59 Geostationary orbit 45:38 Vertical circular motion 47:32 Measuring angle 48:10 Translational vs rotational 49:03 Rotational motion 50:22 Linear to rotational 51:26 Equations of rotation 53:02 Torque 54:52 DEMONSTRATION: Slug gun carousel 56:14 Rotational inertia 57:58 DEMONSTRATION: Rotational inertia 59:35 Rotational kinetic energy 1:00:30 Angular momentum 1:02:21 DEMONSTRATION: Spinning wheel 1:03:12 Conservation of angular momentum 1:05:50 ANALYSIS: Figure skater 1:06:21 Simple harmonic motion 1:07:22 The simple pendulum 1:11:43 DEMONSTRATION: Pendulum tension 1:12:23 DEMONSTRATION: Mass of a pendulum 1:13:08 Pendulum at half height 1:15:25 Mass on a spring 1:15:59 DEMONSTRATION: Combining springs 1:16:55 DEMONSTRATION: Spring period 1:17:12 SHM Equations 1:22:35 SHM and circular motion 1:27:17 Energy of SHM 1:28:29 Resonance 1:29:34 DEMONSTRATION: Mass on a spring resonance 1:30:09 DEMONSTRATION: Resonating balls