Two balls A and B are projected vertically upwards with different velocities. What is the relative acceleration between them?

Explanation

To solve the problem of finding the relative acceleration between two balls A and B projected vertically upwards with different velocities, we can follow these steps:

### Step 1: Understand the motion of the balls
Both balls A and B are projected vertically upwards. When objects are projected upwards, they experience a downward acceleration due to gravity.

### Step 2: Identify the acceleration of each ball
The acceleration due to gravity (g) acts on both balls A and B. This acceleration is directed downwards and has a magnitude of approximately \(9.81 \, \text{m/s}^2\).

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