A steel ball of radius `2 cm` is at rest on a frictionless surface. Another ball of radius `4 cm` moving at a velocity of `81 cm//see` collides elast cally with first ball. After collision the smaller ball moves with speed of

Radius of an iron is 2 cm. The ball is kept at rest on a frictionless horizontal surface. Another ball of radius 4 cm ,moving with velocity 81 cm*s^(-1) , collides with it. Find the velocities of both the balls after collision.

A steel ball of radius 2 cm is initially at rest. It is struck head on by another stell ball of radius 4 cm travelling with a velocity of 81 cm//s . If the collision is elastic their respective final velocities are

A steel ball of radius 2 cm is initially at rest. It is struck head on by another stell ball of radius 4 cm travelling with a velocity of 81 cm//s . The common velocity if it is perfectly inelastic collision.

A steel ball of radius 2cm is initially at rest.It is stuck head on by another steel ball of radius 4cm moving with a velocity of 0.72ms^-1.Assuming that the collosion in completely inceelastic.Calculate the velocity of the balls after collision.

A steel ball of mass m is initially at rest on a horizontal frictionless surface. It is struck head on by another steel ball of mass 2m travelling with a velocity of 50 cm/s. Calculate the velocities of the two balls after a collision assuming it to be elastic.

A solid metal ball of radius 8 cm is melted and cast into smaller balls, each of radius 2 cm. The number of such balls is

A billiard ball moving with a speed of 5 m//s collides with an identical ball, originally at rest. If the first ball stop dead after collision, then the second ball will move forward with a speed of: