Kinesiology 2241A/B Lecture Notes - Lecture 7: Ground Reaction Force, Myocyte, Buoyancy
7 Oct 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 (what is making movement happen) Kinetics drives kinematics cannot have one without the other. Kinetics force acceleration change in velocity change in displacement change in position. Buoyancy (what keeps an object suspended in water) Elastic (distort a shape, will come back to original shape) Fluid drag (throwing a discus perpendicular to the ground) Fluid lift (throwing a discus parallel to the ground) Gravity (force at which the earth is pulling on your body to keep you attached) Pressure (ex: a balloon, pressure keeps the two walls away from each other) Reaction (ex: a chair, opposite reaction to a force we apply sitting on a chair) External force= forces that are acting on a body from an external directions (ex: ground reaction force, or weight due to gravity) Internal force= act within our bodies, like muscle fibers.
