Question

The minimum force required to move a body of mass $m$ vertically upward is

• A. mg
• B. mg/2
• C. more than 2mg
• D. more than mg

Answer 1

Answer: (D)

Weight of a body is $mg$, where $m$ is mass, $g$ the acceleration due to gravity. A body is balanced when a force applied is equal to its weight.
Therefore, to lift it up, an additional force is required.
Hence, the minimum force required is
$(mg+ma)>mg$
which is greater than $mg$.