A ball initally at rest is dropped from a height of 10 m . In strinking the ground , it loses 20 % of its kinetic energy . Calculate the height to which it bounces . Where does the lost kinetic energy go ?

Explanation

To solve the problem step by step, we will follow the principles of energy conservation and the effects of energy loss when the ball strikes the ground.

### Step 1: Calculate the initial potential energy of the ball.
The potential energy (PE) of the ball at a height \( h \) is given by the formula:
\[ PE = mgh \]
Where:
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