Question

. A stone of mass 5 kg lying on ground is raised to height 5 m . Which energy does it require?​

Answer 1

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Given:

Stone of mass 5 kg lying on ground is raised to height 5m

To find:

Which energy is required to do work = ?

Explanation:

As we are rising the stone above the ground thus the energy acting here is potential energy. Always at height there is potential energy which does the work.

Potential energy = mgh

m = mass of object

g = acceleration due to gravity = 9.8 m/s or for easier 10 m/s

h = height of object from reference point ( here reference point is ground)

Here, m = 5 kg, h = 5 m, g = 10 m/s

Work done = Potential energy

Work done = mgh

Work done = 5 × 5 × 10

Work done = 250 Joule

Answer:

Thus, energy required is potential energy

Basic point:

• Try examine such examples to get good hold on it