Same chapter3 marksDifficulty: Medium
A boy of mass 40 kg climbs a staircase of 20 steps, each 15 cm high, in 10 s. Calculate the power he develops. Take g = 10 m s−2.
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3 marksDifficulty: Medium
A machine does 3000 J of work in 15 s. Calculate its power.
Original Khojo Papers practice question — not from a past board paper.
Answer
200 W
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Power = work ÷ time = 3000 ÷ 15 = 200 W.
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