Kinesiology 3341A/B Lecture Notes - Lecture 8: Angular Velocity, Torc

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 3341A/B
• Professor: Jim Dickey

Document Summary

Body is in the air- conservative system- angular momentum conserved. If arms are rotating counter clockwise- causes rest of body to rotate clockwise- can throw off idea of landing on feet. Rotating upper extremities in one direction- can get truck to rotate in opposite direction. Conservative system- large angular momentum in one direction will cause rotation in other direction. Non-conservative system- need to be applying a moment, interacting with the ground. Between feet and ground- all you can do is push the ground to accelerate- can"t grasp the ground and twist it. The ground can"t apply a moment to you, just a force (grey area) The total (linear/angular) momentum of a system remains constant unless external forces/moments influence the system (refer to the impulse-momentum relationship in chapter 5) I = moment of inertia: = angular velocity (rad/s) If you have an angular impulse you will have an angular momentum. If you have angular momentum, body will rotate.