Question

A force $(3\hat{i}+2\hat{j})N$ displaces an object through a distance $(2\hat{i}+3\hat{j})M$ The work done is:

• A. $13J$
• B. $15J$
• C. $5J$
• D. $0J$

Answer 1

Answer: (D)

Using the relation, $W=F.s$
$=(3\hat{i}+2\hat{j}):(2\hat{i}-3\hat{j})$
$=3\times 2+2\times -3$
$=6-6=0$