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A raindrop falling from a height `h` above ground, attains a near terminal velocity when it has fallen through a height `(3//4)h`. Which of the diagrams shown in figure correctly shows the change in kinetic and potential energy of the drop during its fall up to the ground ?A. B. C. D. |
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Answer» Correct Answer - B At a height h above the ground, PE of raindrop is maximum and KE = 0. As the raindrop falls its PE goes on decreasing and KE goes on increasing up to a point `h/4`above the ground. At this stage, rain drop has acquired near terminal velocity (= constant). Therefore, at this stage. KE tends to be constant. PE becomes zero when raindrop falls to the ground. Hence, option (b) is most appropriate |
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