Kinesiology 2241A/B Lecture Notes - Lecture 18: Momentum, Mattress
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14 Mar 2018
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Linear momentum is the mass of an object multiplied by it"s velocity. "how hard it will be to slow something down" Isaac newton called this the "quantity of motion" that an object had. It is a measure of how hard it will be to stop or slow down. A slow moving train has a lot of momentum, since m is large. A thrown baseball has a lot of momentum, since v is large. Time rate of change is related to the amount of force required. Just like a force, linear momentum is a vector. Point of application is the body center of mass. Line of action is always tangent to the pathway of the body. Velocity is always the tangent to the line. If you suddenly stop steering the car, linear momentum will tell you where you"re going to go.
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