KINESIOL 2A03 Chapter Notes - Chapter 7: Nova Scotia Trunk 2, Linear Motion, Momentum
15 Sep 2016
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7. 1 impulse-momentum theorem the impulse of a force on an object is equal to the change in momentum of the object assume that a rigid body is moving linearly with constant acceleration. When a constant resultant force, f, is applied to a body fur duration t, the body"s velocity will be affected. If the force is positive, velocity will be increased; if negative, velocity decreases. Rare for human body to experience constant forces or accelerations so integrate: Linear impulse = change in linear momentum units = kg m/s or n s. Both vectors, must have direction: linear motion: positively or negative along line of motion, 2d or 3d motion: separate equations written for each direction x, y, z. Longer the resultant force is applied, the faster the body will move. Impulse of force quantifies how much influence a force has on a body"s momentum and consequently its velocity. This theorem measures the effectiveness of a force to produce motion.
