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In Which of the following cases the net ...

In Which of the following cases the net force acting on the body is not zero ?

A

A drop of rain falling down with a constant speed

B

A cork of mass 10 g floating on the surface of water

C

A car moving with a constant speed of 20 km `h^(-1)` on a rough road

D

A pebble of mass 0.05 kg is thrown vertically upwards

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The correct Answer is:
D
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