Question

the power of an engine is 20 KW what time will be taken in Lifting 100km body to a height of 50 m

Answer 1

$\Longrightarrow{\boxed{\bold{Answer:2.5\:s}}}$

$\textbf{\underline{Step-by-step explanation :- }}$

Power = Work done / Time

Power = 20 kW or 20,000 W

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Here, Work done = F s cos

Since, cos 0° = 1 and F = ma

Work done = ma × s

= 100 kg × 10 m/s² × 50 m

= 50,000 J

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20,000 W = 50,000 J / Time

Time = 50,000 J / 20,000 W

= 2.5 s