A mass `m_(1)` moves with a great velocity. It strikes another mass `m_(2)` at rest in head-on collision. It comes back along its path with low speed after collision. Then find out whether `m_(1)ltm _(2)` or `m_(1)gtm_(2)`.

Explanation

To solve the problem, we will analyze the situation using the principles of conservation of momentum and the concept of head-on collisions.

### Step-by-Step Solution:

1. **Understand the Initial Conditions**:
- Mass \( m_1 \) is moving with an initial velocity \( u \).
- Mass \( m_2 \) is at rest, so its initial velocity is \( 0 \).

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