An athlete runs along a circular track with a constant speed of 5 m/s . If A,B and C are his instantaneous positions at different times then find the change in velocity (a) from A to B and (b) from A to C.

Explanation

To solve the problem, we need to determine the change in velocity of the athlete as he moves from point A to point B and from point A to point C on a circular track, given that he runs with a constant speed of 5 m/s.

### Step-by-Step Solution:

1. **Identify the Velocity Vectors at Points A, B, and C:**
- Since the athlete is running with a constant speed of 5 m/s along a circular track, we can represent the velocity vectors at points A, B, and C.
- Let's assume:
- At point A, the velocity vector \( \mathbf{v_A} = 5 \hat{i} \) (moving in the positive x-direction).
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