A paricle is moving eastwards with a velocity of `5m//s`. In `10s` the velocity changes to `5m//s` northwards. Find the average acceleration in this time.

Explanation

To find the average acceleration of the particle, we can follow these steps:

### Step 1: Identify the initial and final velocities
- The initial velocity \( \vec{u} \) is \( 5 \, \text{m/s} \) eastwards.
- The final velocity \( \vec{v} \) is \( 5 \, \text{m/s} \) northwards.

### Step 2: Represent the velocities as vectors
- We can represent the eastward velocity as \( \vec{u} = 5 \hat{i} \) (where \( \hat{i} \) is the unit vector in the east direction).
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