A batsman deflects a ball by an angle of `90^(@)` without changing its initial speed, which is equal to 54 km/hr. What is the impulse to the ball ? Mass of the ball is 0.15 kg.

Explanation

To solve the problem, we need to calculate the impulse imparted to the ball when it is deflected by an angle of 90 degrees without changing its speed.

### Step-by-Step Solution:

1. **Convert the Speed from km/hr to m/s**:
The initial speed of the ball is given as 54 km/hr. To convert this to meters per second (m/s), we use the conversion factor:
\[
1 \text{ km/hr} = \frac{1}{3.6} \text{ m/s}
...