centre of mass#!#collisions

STATEMENT-1 : When a projectile explodes in mid air the centre of mass follows circular path after explosion. STATEMENT-2 : In an elastic collision velocities can't be interchanged it colliding bodies have different masses. STATEMENT-3 : During a perfectly elastic collision the kinetic energy of the system remains constant.

A ball kept in a close box moves in the box making collisions with the walls. The box is kept on a smooth surface. The velocity of the centre of mass

Two particles of mass 2kg and 6kg are moving on smooth horizontal surface collides with each other.If velocity of their common centre of mass is 10m/s before collision then what will be the total linear momentum of system of particles after collision.(Assume they move along the surface after collision)

A particle of mass m, collides with another stationary particle of mass M. If the particle m stops just after collision, then the coefficient of restitution for collision is equal to

A body of mass M moving with a speed u has a ‘head on’, perfectly elastic collision with a body of mass m initially at rest. If M > > m , the speed of the body of mass m after collision, will be nearly :

A particle of mass m collides elastically with the pan of mass (M = 2m) of a spring balance, as shown in figure. Pan is in equillibrium before collision. Spring constant is k and speed of the particle before collision is v_(0) . Answer the following three questions regarding this collision. Maximum compression in the spring after the collision the