A motor car running at the rate of `7m//s` can be stopped by brakes in `10m`. Prove that the total resistance to the motion when the brakes are on is one-fourth of the weight of the car.

Explanation

To solve the problem step by step, we will use the equations of motion and the concept of friction.

### Step 1: Identify the given values
- Initial velocity (u) = 7 m/s
- Final velocity (v) = 0 m/s (since the car stops)
- Distance (s) = 10 m

### Step 2: Use the third equation of motion to find acceleration (a)
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