5 identical balls are at rest on a smooth horizontal table. 4 balls are given velocity v and the last one is at rest. Each collision is perfectly inelastic from the shown instant .If total time till last collision is `frac{2.5al}{v}`.Find a.

Two balls each of mass 2kg (one at rest) undergo oblique collision is perfectly elastic, then the angle between their velocities after collision is

A particle (a mud pallet, say) of mass m strikes a smooth stationary wedge of mass M with as velocity v_(0) at an angle theta with horizontal. If the collision is perfectly inelastic, find the a. velocity of the wedge just after the collision. b. Change in KE of the system (M+m) in collision.

Two identical balls each moving with speed v at right angle to each other collide perfectly inelastically. Their speed after collision is

A glass ball collides with a smooth horizontal surface ( xz plane) with a velocity V = ai- bj . If the coefficient of restitution of collision be e , the velocity of the ball just after the collision will be

A hollow circular tube of radius R and negligible internal diameter is fixed on horizontal surface ball A of mas m is given velocity v_(o) in the shown direction. It collides with ball B of mass 2 m . Collision is perfectly elastic. If centre of loop is origin of co-ordinates system, then co-ordinate of next collision is

Two identical balls, each of mass m , are tied with a string and kept on a frictionless surface. Initially, the string is slack. They are given velocities 2u and u . in the same direction. Collision between the balls is perfectly elastic. After the first collision, what is the total loss in kinetic energy of the balls?

A uniform rod of mass m and length L is at rest on a smooth horizontal surface. A ball of mass m, moving with velocity v_0 , hits the rod perpendicularly at its one end and sticks to it. The angular velocity of rod after collision is

STATEMENT - 1 : Two identical balls B and C lie on a horizontal smooth straight groove so that they are touching. A third identical ball A moves at a speed v along the groove. And collides with B as shown in figure. If the collisions are perfectly elastic, then after the collision, balls A and B will come to rest and ball C moves with velocity v to the right. because STATEMENT - 2 : In an elastic collision, linear momentum and kinetic energy are both conserved.

The figure below shows three identical balls A , B and C. Initially , the baiis B and C are at rest and the ball A while moving with a veiocity v, collides with ball B. if the collision is perfectiy elastic , then after the collision