Question

A painter lifts a can of paint that weighs 40 N a distance of 2 m. How much work do they do?

Answer 1

Given :

Weight of paint can = 40N

Distance covered by painter= 2m

To find:

Work done by painter

Solution:

• Work done is equals to energy spent in doing a work.
• Work done being a scalar quantity is given by the dot product of force and distance.

$wd = f \times s \times \cos( \theta)$

• Here theta is the angle between f and s
• Since in the given case, weight of paint can (force) acts downwards and displacement is done in horizontal direction, theta equals to 90°
• Cos90°= 0
• Hence, work done by painter is zero.