5
Question Question 5
A mass of 10 kg is at a point A on a table. It is moved to a point B. If the line joining A and B is horizontal, what is the work done on the object by the gravitational force? Explain your answer.
Given,
Mass (m) = 10 kg
Work done by gravity depends on the vertical displacement of the body. It is independent of the horizontal path.
So, work done by gravity is = m g h
Where,
Vertical displacement, h = 0 [∵ the line joining A and B is horizontal. ]
∴ W = m × g × 0 = 0
Hence, work done on object by gravity is zero.