A ball of mass 
moving with a velocity 
along the 
-axis, hits another ball of mass 
which is at rest. After the collision, first ball comes to rest while the second ball disintegrates into two equal pieces. One piece starts moving along 
-axis with a speed of 10 
. The second piece starts moving at an angle of 
with respect to the 
-axis. The velocity of the ball moving at 
with 
-axis is 
. The configuration of pieces after collision is shown in the figure below. The value of 
to the nearest integer is
Text Solution
Verified by Experts20
(20) Let velocity of 
fragment is 
then by conservation of linear momentum
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