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Question

# A skydiver who weighs 60 kg is falling down at a certain speed. He covers 40 m in 2 seconds. The rate of doing work by the skydiver is [Take g=10 m/s2]

A

12 kW

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B

16 kW

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C

24 kW

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D

32 kW

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Solution

## The correct option is A 12 kW Rate of doing work is the power of the skydiver = work donetime Work done = Force x Displacement Force = m×g=(60×10)N Dispalcement= 40 m (Given) Now, work done=(60×10×40) J So, rate of doing work by the skydiver =60×10×402 W =12000 W =12 kW Therefore, power of the skydiver is equal to 12 kW.

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