Question

What is the work done by the force of gravity in a Stone of mass 250g is thrown up through a height of 2.5m

Answer 1

WORK DONE BY GRAVITY = mgh

work done = 1/4 *2.5 *10

= 25/4 = 6.25 joules

Answer 2

The work done by the force of gravity is 6.12 Joules.

Explanation:

It is given that,

Mass of the stone, m = 250 g = 0.25 kg

It is thrown up to a height of 2.5 meters.

It is required to find the work done. It can be calculated by the force of gravity when a stone thrown up. It is called its potential energy. It is given by :

$E=mgh$

$E=0.25\ kg\times 9.8\ m/s^2\times 2.5\ m$

E = 6.12 Joules

So, the work done by the force of gravity is 6.12 Joules. Hence, this is the required solution.

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