A block of mass 5 kg moves from left to right with a velocity of `2ms^(-1)` and collides with another block of mass 3 kg moving along the same line in the opposite direction with velocity `4 ms^(-1)`.
(i) If the collision is perfectly elastic, determine velocities of both the blocks after their collision.
(ii) If coefficient of restitution is 0.6, determine velocities of both the blocks after their collision.

Explanation

To solve the problem, we will break it down into two parts: (i) for a perfectly elastic collision and (ii) for a collision with a coefficient of restitution of 0.6.

### Part (i): Perfectly Elastic Collision

1. **Identify the masses and velocities:**
- Mass of block 1 (m1) = 5 kg, initial velocity (u1) = 2 m/s (to the right)
- Mass of block 2 (m2) = 3 kg, initial velocity (u2) = -4 m/s (to the left)

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