To what height should a box of mass 150 kg be lifted, so that its potential energy may become 7350 joules? (g = 9.8 m/s2)
Given,
Mass, m = 150 kg,
Acceleration due to gravity, g = 9.8 m/s2, Potential energy, P.E = 7350 J
Therefore,
h = P.E/mg
=7350/150 × 9.8
=7350/1470
= 5m.
Hence, the box should be lifted to a height of 5m.