Kinesiology 2241A/B Lecture Notes - Lecture 8: Resultant Force, Trigonometric Functions, Parallelogram
16 Oct 2018
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A force is an action that causes mass to be accelerated. Acceleration is how fast you"re changing your speed. Common definition: a push or pull, a rub or pressure, a blow or impact, gravity. Isaac netwons"s 3 laws: objects ( like the soccer ball) don"t want to be accelerated because objects possess inertia. The force required to accelerate an object is proportional to its mass f= m x a. If the force is applied to an object, the object pushes back with the same force. Arrow represents that force and acceleration are vectors (have movement and direction; force applies movement in the same direction as acceleration, mass is a scalar) If you apply a force to something, it"ll apply that force back on you (action rxn); everything does cancel out, but on different bodies, therefore things still move*** Moving at constant velocity on earth requires energy (not in space tho)
