A bullet of mass 20 gram is fired horizinatally with a speed of 150`m//s` from a pistol of mass 2.5kg. What is the recoil velocity of the pistol ?

Explanation

To find the recoil velocity of the pistol when a bullet is fired, we can use the principle of conservation of momentum. Here’s the step-by-step solution:

### Step 1: Understand the system
Initially, both the bullet and the pistol are at rest. Therefore, the total initial momentum of the system is zero.

### Step 2: Define the variables
- Mass of the bullet, \( m_b = 20 \) grams = \( 0.02 \) kg (since 1 gram = 0.001 kg)
- Speed of the bullet, \( v_b = 150 \) m/s
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