If K.E of a body is decreased by 20 % then find the percentage change in momentum .

Explanation

To solve the problem of finding the percentage change in momentum when the kinetic energy of a body is decreased by 20%, we can follow these steps:

### Step 1: Understand the relationship between kinetic energy and momentum
The kinetic energy (K.E) of a body is given by the formula:
\[ K.E = \frac{p^2}{2m} \]
where \( p \) is the momentum and \( m \) is the mass of the body. This implies that kinetic energy is directly proportional to the square of momentum.
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