Q. The relationship between force and position is shown in the figure given (in one dimensional case). The work done by the force in displacing a body from $x = 1\ cm$ to $x = 5\ cm$ is
A) $20\ ergs$
B) $60\ ergs$
C) $70\ ergs$
D) $700\ ergs$
Explanation
(a) Work done = area between the graph and position axis
$W = 10 \times 1 + 20 \times 1 - 20 \times 1 + 10 \times 1 = 20\ erg$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.