A car of mass 800kg attains a speed of 25m/s in 20secs. T...
A car of mass 800kg attains a speed of 25m/s in 20secs. The power developed in the engine is?
1.25 x 104W
2.50x 104W
1.25 x 106W
2.50 x 106W
Correct answer is B
P = mv2t=800×25×2520
2.5 x 104W
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