Question

Calculate the potential energy of a body of mass 10 kg at a height of 3 m above sea level and at a height of 7 m above sealevel. g = 10 m/s2​

Answer 1

Answer :

Mass of body = 10kg

Gravitation acceleration = 10m/s²

We have to find potential energy of body

• at a height of 3m
• at a height of 7m

★ Potential energy of body is defined as the energy possessed by a body by virtue of its position$.$

• It is a scalar quantity having only magnitude.
• SI unit : J

Potential energy of body of mass m at a height h is given by : U = m × g × H

⧪ At a height of 3m :

➠ U = m × g × H

➠ U = 10 × 10 × 3

➠ U = 300 J ___ (I)

⧪ At a height of 7m :

➠ U' = m × g × H'

➠ U' = 10 × 10 × 7

➠ U' = 700 J ___ (II)