Momentum and CollisionMedium
Question
A body of mass 2kg is projected upward from the surface of the ground at t = 0 with a velocity of 20m/s. One second later a body B, also of mass 2kg. is dropped from height of 20m. If they collide elastically then velocities just after collision are
Options
A.vA = 5 m/s downward, vB = 5 m/s upward
B.vA = 10 m/s downward, vB = 5 m/s upward
C.vA = 10 m/s downward, vB = 10 m/s upward
D.Both move downward with velocity 5 m/s
Solution
After 1s, vA = 20 - 10 × 1 = 10 m/s
and vB = 0 + 10 × 1 = 10 m/s
At the time of collision
VA = VB = 5m/s
After collision velocity gets enter changed
and vB = 0 + 10 × 1 = 10 m/s
At the time of collision
VA = VB = 5m/s
After collision velocity gets enter changed
Create a free account to view solution
View Solution FreeMore Momentum and Collision Questions
The kinetic energy of a body becomes four times its initial value. The new linear momentum will be:-...A particle of mass 4m which is at rest explodes into masers m, m& 2m. Two of the fragments of masses m and 2m are found ...Two elastic bodies P and Q having equal masses are moving along the same line with velocities of 16 m/s and 10 m/s respe...Three particle start from origin at the same time with a velocity 2ms-1 along positive x-axis, the second with a velocit...A railway flat car has an artillery gun installed on it. The combined system has a mass M and moves with a velocity v0. ...