Question

a man lifts a mass of 20 kg to a height of 2.5m.Assuming that the force of gravity on 1 kg mass is 10 Newton find the work done by the man.​

Answer 1

Answer:

500J

Explanation:

given:-

mass m=20kg

Height h=2.5m

acceleration due to gravity g = 10N/kg or 10 m/s²

Work done by the man = W

W = mgh

W = 20×10×2.5

W = 500J

Answer 2

Explanation:

Solution:-

W = force× displacement (f×d)

f = 20× 10 =200

=200 × 2.5

=50.0 joules