Question

Rahul takes 1 minute to raise a box to a height of 1 metre and Rohan takes $\frac{1}{2}$ minute for the same work. Comment on the energy consumed by the two in doing so.

• A. Energy spent by Rahul is more.
• B. Energy spent by both Rahul and Rohan is same.
• C. Energy spent by Rohan is more
• D. No energy is spent by Rohan

Answer 1

The correct option is B

Energy spent by both Rahul and Rohan is same.

In both the cases, the initial and final point of the box is same. Thus work done on the box in both the cases is same. This work done is stored in the form of potential energy in the box which is same in both the cases. Moreover, work done or energy is independent of time.