On a frictionless surface, a block of mass 
moving at speed 
collides elastically with another block of same mass 
which is initially at rest. After collision, the first block moves at an angle 
to its initial direction and has a speed 
. The second block's speed after the collision is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
According to law of conservation of kinetic energy, we have
Velocity of second block after collision, 
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