Work Energy And Power Question 114
Question: Two bodies having same mass 40 kg are moving in opposite directions, one with a velocity of 10 $ m/s $ and the other with $ 7m/s. $ If they collide and move as one body, the velocity of the combination is [Pb. PMT 2000]
Options:
A) $ 10m/s $
B) $ 7m/s $
C) $ 3m/s $
D) $ 1.5m/s $
Show Answer
Answer:
Correct Answer: D
Solution:
By the conservation of momentum $ 40\times 10+(40)\times (-7)=80\times v $
therefore $ v=1.5m/s $
