Question

Force $F$ on a particle moving in a straight line varies with distance d as shown in figure. The work done on the particle during its displacement of $12m$ is:

• A. $18J$
• B. $21J$
• C. $26J$
• D. $13J$

Answer 1

The correct option is A $18J$

$wd=\int F.dx$
which is area under $F-d$ curve
Area =$wd=2\times 6+\frac{1}{2}\times 2\times 6$
$=12+6$
$=18J$