KAAP426 Lecture 2: Biomechanics Lecture 2: Pressure, Torque, and Levers
6 Sep 2016
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Pressure = force / area ( p = f / a ) Ex: athletic gear such as helmets and shin guards are a good example of this relationship. They are designed to spread the force over a larger area in order to decrease the pressure on the athlete"s body. Impulse = net force x time = change in momentum = mvf - mvi. Unit: kilogram x meter / seconds = kgm/s (same as. Ex: the foam padding found on equipment is meant to make the impact longer. This decreases acceleration because a = v/t, since force and acceleration are directly proportional it means force also decreases. Impulse will remain the same with or without padding because mass and velocity of the impact would not change. We already know that time of impact is increased which means net force must decrease to keep impulse constant.
