Q. A lorry and a car moving with the same K.E. are brought to rest by applying the same retarding force, then
A) Lorry will come to rest in a shorter distance
B) Car will come to rest in a shorter distance
C) Both come to rest in a same distance
D) None of the above
Explanation
(c) Stopping distance $= \frac{kinetic\ energy}{retarding\ force} \Rightarrow s = \frac{1}{2}\frac{mu^{2}}{F}$
If lorry and car both possess same kinetic energy and retarding force is also equal then both come to rest in the same distance
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.