Q. The relationship between the force F and position $x$ of a body is as shown in figure. The work done in displacing the body from $x = 1m\ $to $x = 5$m will be
A) 30 J
B) 15 J
C) 25 J
D) 20 J
Explanation
(b) Work done=area enclosed by $F - x$graph
=area of ABNM + area of CDEN - area of EFGH + area of HIJ
=$1 \times 10 + 1 \times 5 - 1 \times 5 + \frac{1}{2} \times 1 \times 10$
$= 10 + 5 - 5 + 5 = 15\ J$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.