Kinesiology 3347A/B Lecture 3: Chapter 3

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Document Summary

Based on optimizing biomechanical principles of motion and stability over time. Often produce more force, velocity, or accuracy. Can be seen across variety of motor skills. Developmental changes in movement occur according to biomechanical principles. Motion and stability are two principles within the larger field of biomechanics. Motion and stability are known as the physics of movement. An object at rest stays at rest and an object in motion stays in motion until acted upon by a force. Inertia is resistance to motion related to mass. Momentum is the product of mass and velocity. We must exert force to: move objects, move ourselves. More inertia means that: it is harder to move, more force application is required. Object"s force is related to mass and acceleration (f = ma) Object"s acceleration is relation to force applied and inversely related to mass (a = f/m) People have limits on how much force they can apply to throw: object with less mass.

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