A student drops,from rest,a table-tennis ball in air.
What happens to the vilocity and to the acceleration of the ball during the first few seconds after release?
(A)velocity decrease and acceleration also decreases
(B)velocity decreases and acceleration increases
(C)velocity increases and acceleration decreases
(D) velocity increases and acceleration also increases.
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Answer:
In the atmosphere, velocity increases as long as there is acceleration, but because of the drag from the atmosphere, acceleration decreases continuously to zero at the ball's terminal velocity, at which point the resistance from air pressure will remain the same while velocity in reference to the ground will gradually
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