Question

The work done in holding a mass of 50kg at a high of 2 meter abo e the griund is

Answer 1

The object is held i.e. it is at rest. So, it possesses potential energy. So, the work done here is synonymous to the potential energy.

m = 50 kg
g = 9.8 m/s^2
h = 2 m

Potential energy
= mgh
= (50)(9.8)(2)
= 98 joules

Thus, the work done is 98 joules.