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Work Energy Theorem Application

The system is...

Question

The system is released from rest. When 10 kg block reaches at ground then find work done by gravity on 10 kg block.

A

100 J

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B

200 J

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C

300 J

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D

400 J

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Solution

The correct option is D $200 J$
Work done by gravity on 10 kg block $= W = m g h$
$\Rightarrow W = 10 \times 10 \times 2$
$\Rightarrow W = 200 J$

Hence, correct answer is option $B$

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