Question

The potential energy of a body is 1500 J having mass 50 kg then find hight?

Answer 1

Explanation:

Potential energy can be calculated as follows:

PE = mgh

= 50 x 10 x 3 = 1500 J

Since KE is zero at that height hence mechanical energy of object at 3 m height

= 1500 J 3

At half the height, i.e. 1.5 m, potential energy can be calculated as follows.

PE = mgh

= 50 x 10 x 1.5 = 750 J

At this stage also the mechanical energy would be 1500

Hence, KE = Mechanical Energy – Potential Energy

= 1500 J –750 J = 750 J

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