Work Energy And Power Question 185

Question: An engine develops 10 kW of power. How much time will it take to lift a mass of 200 kg to a height of 40 m. (g=10m/sec2) [CPMT 1992]

Options:

A) 4 sec

B) 5 sec

C) 8 sec

D) 10 sec

Show Answer

Answer:

Correct Answer: C

Solution:

P=mght=10×103

therefore t=200×40×1010×103

=8sec



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