Work Energy And Power Question 157
Question: A body of mass m moving with a constant velocity v hits another body of the same mass moving with the same velocity v but in the opposite direction and sticks to it. The velocity of the compound body after collision is [NCERT 1977; RPMT 1999]
Options:
A) v
B) 2v
C) Zero
D) v/2
Show Answer
Answer:
Correct Answer: C
Solution:
Initial momentum of the system = $ mv-mv=0 $
As body sticks together final momentum = $ 2mV $
By conservation of momentum $ 2mV=0 $ \ V = 0
