KINE 3030 Study Guide - Net Force, Ground Reaction Force
30 Dec 2014
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Document Summary
Inertia is the tendency of an object to resist a change in a state of motion: largely dependent on its mass how much matter is contained in an object, mass is a scalar (magnitude only) Force (f) is a push or a pull acting on an object. Is a vector (magnitude and direction: causes or attempts to cause a change in the motion of a body, measured in newtons (n) = mass (kg) x acceleration (m/s) Acts on the centre of gravity (vector points down) External forces include gravity, ground reaction force, and friction (horizontal ground reaction force) When you walk, you exert a force forward (horizontally) and friction causes an opposite force backward so you can propel forward. If however, there is less friction (on ice) then you keep sliding forward (no ground reaction force) Net force refers to the force resulting from adding two or more vectors.
