Question

A man lifts a luggage of weight $100\text{N}$ from the ground and puts it on his head $1.7\text{m}$ above the ground. Calculate work done by him on the luggage.

• A. $150\text{J}$
• B. $170\text{J}$
• C. $180\text{J}$
• D. $200\text{J}$

Answer 1

The correct option is B $170\text{J}$

Work done by the man on the luggage = Force $\times$Displacement

Given: Force = $100\text{N}$
Displacement = $1.7\text{m}$
Work done = $100\times 1.7$ = $170\text{J}$
Hence the required work done is $170\text{J}$. It can be noted that the work is done by the man on the luggage because he lifts it against the gravitational force of the Earth.