A block of mass m moving with a velocity v along a frictionless horizontal track. It collides with a block of mass 
moving with 
perfect elastically. The final speed of the block A is
A
B
v
C
D
None of these
Text Solution
Verified by ExpertsThe correct answer is:
A
Let the block A and block B move with speed 
and 
after collision, as shown in the figure.
From conservation of momentum,
or 
… (i)
From equation of coefficient of restitution.
… (ii)
Solving Eqs. (i) and (ii), we get 
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