Correct Answer: Option A

Explanation

- Acceleration, a = \(\frac{\text{v}}{\text{t}}\) = \(\frac{25}{20}\) = 1.25ms\(^{-2}\)
- Force,  F = ma = 800 x 1.25 = 1,000N
- Average power = Force × average velocity =  1000 \(\times \frac{0 + 25}{2}\) = 12,500W = 1.25 x 10\(^4\) W

There is an explanation video available below.

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