Question

What is the potential energy in a body, mass 5kg on top of a pole 20 m high?

Answer 1

Answer: Potential energy of the body is 1 kilo Joules.

Step-by-step explanation:

Gravitational potential energy of a body at a height h is given by the formula : Potential energy = mgh

m ⇒ mass of the body

g ⇒ acceleration due to gravity

h ⇒ height oat which body is placed from the earth's surface

Given :

m = 5 kg

g = 10 m/s²

h = 20 m

Therefore,

Potential energy = mgh

Potential energy = 5 × 10 × 20 Joules

Potential energy = 1000 Joules

Potential energy =  1 kJ

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