The work done in raising a mass of 15 gm from the ground to a table of 1m height is
15 J
152 J
1500 J
0.15 J
Work done = Change in potential energy of the mass W=mgh=15×10−3×10×1=0.15J
A book of masses 100g is raised to the top of a table of a height 1 m find the magnitude of the work done by the force applied against the gravitational force equal to g =10m/s2