Forces Final Review Vocabulary

accelerationrate of change of velocity; caused when unbalanced forces act on an objectNewton (N)Standard unit for forceweighta measure of the force of gravity on an object; mass x acceleration due to gravityacceleration due to gravityvalue of 9.8 meters per second squared on Earthterminal velocitywhen F of air resistance pushing up against the object equals the F of gravity pulling down the net F is zero; so the object stops accelerating; this point is the velocity the object has while fallingmomentumdepends on the mass of an object and the velocity at which it is moving; can be transferred from one object to anotherLaw of Conservation of MomentumTotal momentum in a system does not change unless outside forces act on the objectNewton's First Law of MotionAn object at rest will remain at rest and an object in motion will remain in motion with a constant velocity unless unbalanced forces act on the objectNewton's Second Law of MotionA force acting on an object will cause the object to accelerate in the direction of the force; the greater the mass of the object being accelerated, the greater the amount of force needed to accelerate the objectNewton's Third Law of MotionFor every force on one object, there is an equal and opposite force on another object