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A steel ball is placed on the surface of...

A steel ball is placed on the surface of water in a deep tank. Water exerts a resistive force which is proportional to the velocity of the ball. The steel sinks into the water:

A

With decreasing acceleration and finaly attains a constant velocity

B

with constant acceleration equal to the gravitational acceleration

C

with constant acceleration less than the gravitational acceleration

D

with acceleration decreasing initially and reversing after a finite time

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The correct Answer is:
a
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