A ball falls straight down through the air under the influence of gravity. There

Question

A ball falls straight down through the air under the influence of gravity. There is a retarding force on the ball provided by air resistance. Eventually the ball reaches a terminal velocity. Which of the following TWO statements about the ball in the time before it reaches terminal velocity are true?

A. The magnitude of the velocity of the ball decreases to a constant value

B. The magnitude of the acceleration of the ball decreases to a constant rate

C. The magnitude of acceleration is a constant value with a magnitude less than g

D. The magnitude of the velocity increases at a constant rate

Explanation / Answer

Air resistance force oppose the velocity of moving object.

Option B . The magnitude of acceleration of the ball decreases to a constant rate .

Option D. The magnitude of velocity increases at a constant rate

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