Question

A bag of wheat weighs 50 kg, find the height to which it should be raised so that potential energy is 5000 J(g = 10m/s 2) ?

Answer 1

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P.E ➾ mgh

5000 ➾ 50 × 10 × h

5000 ➾ 500h

h ➾ 5000 / 500

h ➾ 10m...✔

Answer 2

Given :

Mass of bag (M) = 50 Kg

Potential Energy (PE) = 5000 J

To Find :

Height to which the mass should be raised to have a potential energy of 5000 J

Solution :

The ability of a body to do work due to its special position or configuration, is called potential energy of the body.

         Potential Energy (PE) = Mgh

where, M = mass; g = acceleration due to gravity; h = height

∴ Potential Energy (PE) = 50 × 10 × h

⇒        5000                  =  500h

⇒         h                        = 10 m

Therefore, the height to which the bag should be raised to have a potential energy of 5000 J is 10 m.