Work Energy And Power Question 99
Question: A body of mass 2 kg collides with a wall with speed 100 m/s and rebounds with same speed. If the time of contact was 1/50 second, the force exerted on the wall is [CPMT 1993]
Options:
A) 8 N
B) $ 2\times 10^{4}N $
C) 4 N
D) $ 10^{4}N $
Show Answer
Answer:
Correct Answer: B
Solution:
$ F=\frac{dp}{dt}=m\frac{dv}{dt}=\frac{m\times 2v}{1/50} $ = $ \frac{2\times 2\times 100}{1/50}=2\times 10^{4}N $
