Kinesiology 2241A/B Lecture Notes - Lecture 6: Buoyancy, Ground Reaction Force
20 Apr 2016
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Document Summary
Kinetics is concerned with the relationship between the motion of bodies and its causes, namely forces and torques . Kinetics drive kinematics, without kinetics you can"t have kinematics. Torques cause rotation o: roll, pinch, yaw. It all starts with force cause a discus to travel a greater distance if you throw it with the narrow edge as the leading edge, minimal drag force, higher lift. Examples of forces (see the effects but not the forces itself) Elastic- distort shape but will always go back to original shape. External- ground reaction force, ex. weight due to gravity, friction, Mathematical link between force and acceleration with the introduction of mass. Represented graphically by a vector: therefore, linked to velocity and displacement too, has a magnitude and direction o, each force gets a unique vector, vector composition to sum forces to find resultant (net) force. Arrow: length= magnitude, direction= direction, tail= point of application.
