A car of mass 800kg attains a speed of 25m/s in 20secs. The power developed in the engine is?
- 1.25 x 10\(^{4}\)W
-
2.50x 10\(^{4}\)W
- 1.25 x 10\(^{6}\)W
- 2.50 x 10\(^{6}\)W
The correct answer is: B
Explanation
P = \(\frac{mv^{2}}{t} = \frac{800 \times 25 \times 25}{20}\)
2.5 x 10\(^{4}\)W
There is an explanation video available .