Two particles of masses m 1 and m 2 in projectile motion have velocities 
and 
respectively at time t = 0. They collide at time t 0 . Their velocities become 
and 
at time 2t 0 while still moving in air. The value of 
is
A
Zero
B
(m 1 + m 2 )gt 0
C
2(m 1 + m 2 )gt 0
D
(m 1 + m 2 )gt 0
Text Solution
Verified by ExpertsThe correct answer is:
C
= | Change in momentum of the two particles |
= | External force on the system | × time interval
= (m 1 + m 2 ) g(2 t 0 )
= 2(m 1 + m 2 ) gt 0
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