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Subjects
Science CBSE
Class 9
Work and energy
Textbook based HOTS II
2.
Multiple choice question II
Exercise condition:
2
m.
A boy of mass \(40\ kg\) runs up a staircase of \(40\) steps in \(10\ s\). If the height of each step is \(25\ cm\), what is the power of the boy? (Take \(g\ =\ 10\ ms^{–2}\)).
\(100\ W\)
\(200\ W\)
\(400\ W\)
\(800\ W\)
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