Momentum and CollisionHard
Question
Two particle of masses m1 and m2 in projectile motion have velocities 
and 
respectively at time t = 0. They collide at time t0. Their velocities become 
and 
at time 2t0 while still moving in air. Then value of 
is
and respectively at time t = 0. They collide at time t0. Their velocities become and at time 2t0 while still moving in air. Then value of isOptions
A.Zero
B.(m1 + m2)gt0
C.2(m1 + m2)gt0
D.
(m1 + m2)gt0
(m1 + m2)gt0Solution
= |change in momentum of the two particles|
= |External force on the system| × time interval
= (m1 + m2)g (2t0) = 2(m1 + m2)gt0
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