Question

How many joules of work is performed by a machine of power 40 W in 1½ hour?

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Answer

Question

How many joules of work is performed by a machine of power 40 W in 1{1\over2} hour? [Ans. 216000 J]

Answer

Power (P) = 40 W

Time (t) = 1{1\over2} hour

= 1.5 × 60 × 60 = 5400 s

Work (W) = Power (P) × Time (t)

= 40 × 5400

= 216000 J

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