A body of mass $2 K g$ is raised to $5 m$ .Find the work done. $(g = 10 m / s^{2})$
(Hint:here work done=gravitational potential energy)

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Solution

Step 1. Given
The mass of the given object $= 2 K g$ .
The displacement of the object $= 5 m$ .
Step 2. Calculation
We have to find the work done.
It is given that work done=gravitational potential energy.
The gravitational potential energy $= P E = m g h$
= $2 \times 10 \times 5$ = $100 J$ .
Hence, the work done $= 100 J$ .

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