An object falls from rest through the air and the air resistance on it increases.The object reaches terminal velocity.
Which quantity decreases until its terminal velocity is reached?
(A)acceleration
(B)kinetic energy
(C)speed
(D)weight
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Answer:
force of air resistance is approximately proportional to the speed of the falling object, so that air resistance increases for an object that is accelerating, having been dropped from rest until terminal velocity is reached. At terminal velocity, air resistance equals in magnitude the weight of the falling object.
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