Q. When a force is applied on a moving body, its motion is retarded. Then the work done is
A) Positive
B) Negative
C) Zero
D) Positive and negative
Explanation
(b) The angle between the displacement and the applied retarded force is $180^{0\ }$
$\therefore$Work done=$Fs\cos{180{^\circ}} - Fs$
$= - Ve$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.