Question

A body of mass m kg is lifted by man to a height of one meter in 30 sec. Another man lifts the same mass to the same height in 60 sec. The work done by them are in the ratio

Answer 1

Answer:

1 : 2

Explanation:

in first case , work = m × 1 × 30 J=30m J

In second case , work = m × 1 × 60 J = 60m J

So the ratio is = 30m : 60m = 1 : 2