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