Question

How much energy is gained by a box of mass $20kg$ when a man.

(i) Carrying the box waits for $5\min$ for a bus?

Answer 1

Step 1: Given data:

Mass $m=20kg$

The waiting time by the man for the bus is $5\min$.

Step 2: Find the energy gained by a box:

We know, $Workdone=Force\times Displacement$

1. The displacement travelled by the man is zero, as the man is standing for the bus in a place for $5\min$.
2. When the displacement travelled by the body is zero, the work done is also zero.

Hence, the energy gained by a box of mass $20kg$ when a man carrying the box waits for $5\min$ for a bus is zero.