A ball of mass 0.1 kg collides head on with another identical ball at rest . Total kinectic energy of the system after collision is found to be 0.2 J . Find minimum and maximum possible speed of first ball before collision .

Explanation

To solve the problem, we need to find the minimum and maximum possible speed of the first ball before the collision, given the mass of the ball and the total kinetic energy after the collision.

### Step-by-Step Solution:

1. **Identify Given Data:**
- Mass of the ball, \( m = 0.1 \, \text{kg} \)
- Total kinetic energy after collision, \( KE_{final} = 0.2 \, \text{J} \)

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