STANDARD Physics Conservation of Mechanical Energy MCQ Question
A ball of mass m is dropped from a cliff of height H. The ratio of its kinetic energy to the potential energy when it is fallen through a height 3/4 H is
3 : 4
4 : 3
1 : 3
3 : 1
Correct Answer
Detailed Explanation
When the ball falls through a height of 3/4 H, the potential energy at that point is mgh/4 and the kinetic energy is 3mgh/4. The ratio of kinetic energy to potential energy is (3mgh/4) / (mgh/4) = 3:1.
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