Kinesiology 2241A/B Lecture Notes - Lecture 8: Body Force, Pythagorean Theorem, Hypotenuse
21 Feb 2018
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2 definitions: physics definition is an action that causes mass to be accelerated, common definition is a push, pull, rub, pressure, blow, impact or gravity. First law of inertia (cid:894)things don"t want to accelerate(cid:895) Second law is if you need to accelerate something by using force to get an acceleration: amount of force needed is proportional to its mass. Third law is the price you pay for applying that force. If you apply a force to something its going to push a force back to you. For every action there is a re-action. Force and acceleration are vectors so they have a magnitude and direction. Mass is a scalar it only has a magnitude. The amount of matter that makes up an object is its mass, measured in kilograms. Gravity pulls an object toward the center of the earth with a force that has the magnitude.
