A body A collides elastically with another body B at rest . The bodies A and B move in opposite directions with same speeds . Calculate the ratio of masses of A and B .

Explanation

To solve the problem of the elastic collision between body A and body B, we will follow these steps:

### Step 1: Define the variables
Let:
- Mass of body A = \( m_A \)
- Mass of body B = \( m_B \)
- Initial velocity of body A = \( u_A \)
- Initial velocity of body B = \( u_B = 0 \) (since body B is at rest)
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