Work Energy And Power Question 67
Question: A lorry and a car moving with the same K.E. are brought to rest by applying the same retarding force, then [IIT 1973; MP PMT 2003]
Options:
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
Show Answer
Answer:
Correct Answer: C
Solution:
$ \text{Stopping distance}=\frac{\text{kinetic energy}}{\text{retarding force}} $
therefore $ 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.
