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A car of mass 800kg attains a speed of 25m/s in 20 secs. The power developed in t...


Question

A car of mass 800kg attains a speed of 25m/s in 20 secs. The power developed in the engine is

Options

A) 1 . 25 x 104 W

B) 2 . 50 x 104 W

C) 1 . 25 x 106W

D) 2 . 50 x 106 W


The correct answer is B.

Explanation:

Power = Force x \(\frac{distance}{time}\) = \(\frac{m(v - u)}{t} \times v\)

\(\frac{800(25 - 0)}{20} \times 25\) = 2.5 x 10 4 watts


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