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 $g = 10 m / s^{2}$ ]

12 kW

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16 kW

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24 kW

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32 kW

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Solution

The correct option is A
12 kW

Rate of doing work is the power of the skydiver = $\frac{w o r k d o n e}{t i m e}$

Work done = Force x Displacement

Force = $m \times g = (60 \times 10) N$

Dispalcement= 40 m (Given)

Now, work done $= (60 \times 10 \times 40) J$
So, rate of doing work by the skydiver $= \frac{60 \times 10 \times 40}{2} W$
$= 12000 W$
$= 12 k W$
Therefore, power of the skydiver is equal to 12 kW.

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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 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 $g = 10 m / s^{2}$ ]