A steel ball of mass `0.5 kg` is fastened to a cord `20 cm` long and fixed at the far end and is released when the cord is horizontal. At the bottom of its path the ball strikes a `2.5 kg` steel block initially at rest on a frictionless surface. The collision is elastic. The speed of the block just after the collision will be.

A bullte weighing 5 g and moving with a velocity 600 m//s strikes a 5 kg block of ice resting on a frictionless surface. The speed of the block after the collision is

A bullet weighing 10 gm and moving at 300 m/s strikes a 5 kg ice and drops dead. The ice block is placed on a frictionless level surface. The speed of the block after the collision, is

A ball of mass m suspended from a rigid support by an inextensible massless string is released from a height h above its lowest point. At its lowest point it collides elastically with a block of mass 2m at rest on a frictionless surface. Neglect the dimensions of the ball and the block. After the collision the ball rises to a maximum height of–

A buttle weighting 10 g and moving with a velocity 800 ms^(-1) strikes a 10 kg block resting on a frictionless surface. The speed of the block after the perfectly inelastic collision is approximately

A buttle weighting 10 g and moving with a velocity 800 ms^(-1) strikes a 10 kg block resting on a frictionless surface. The speed of the block after the perfectly inelastic collision is approximately

The ball is released when the string is horizontal. The collision between the ball and the block is head - on elastic. The velocities of the ball and the block immediately after collision

Two balls having masses m and 2m are fastened to two light strings of same length l figure. The other ends of the strings ar fixed at O. The strings are kept in the same horizontal line and the system is released from rest. The collision between the balls is elastic. a. Find velocities of the balls just after their collision. b. How high will the balls rise after the collision.

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