1.

A ball is dropped from a height of 30m and on hitting the ground if it loses 40% of its energy

Answer»

Explanation:

The potential ENERGY of gravity is directly affected by the height. When the ball is DROPPED from a 10m height, it loses 40% energy THUS affecting the same percentage of height when it bounces BACK. Now 40% of the energy lost means 40% of the height also lost on bouncing back.



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