Force is required to lift a body from the ground to a height h and work is measured as the product of force and magnitude as the product of force and magnitude of displacement.
A man of mass 60 kg carries a stone of mass 20 kg to the top of a multistorey building of height 50 m. Calculate the total energy spent by him?

Explanation

Total energy = mgh = `(60 + 20)xx 9.8 xx 50 = 39200 J`