A moving ball of mass 0.1kg undergoes an elastic head-to-head collision with another body at rest. After collision, the first ball rebounds at one-third of its original speed while second ball starts moving forward . find the mass of the second ball.

A ball of 0.1 makes an elastic collision with a ball of unknown mass that is initially at rest. If the 0.1 kg ball rebounds at one third of its original speed, what is the mas of the other ball ?

A ball of mass 0.1 kg is suspended by a string 30 cm long. Keeping the string always taut, the ball describes a horizontal circle of radius 15 cm. Find its angular speed and tension.

A ball moving at 9m *s^(-1) , collides with an identical ball at rest. After collision, both the balls scatter at 30^@ with the initial direction of motion. Find the velocity of each ball after collision. Does the kinetic energy remain conserved in such a collision ?

A ball of mass 100g moves with a velocity of 100m*s^(-1) . Find the wavelength of the wave associated with the moving ball.

A ball of mass 1 kg is thrown vertically upward and returns to the ground after 3 second. Another ball, thrown at 60^(@) with vertical also stays in air for the same time before it touches the ground. The ratio of the two heights are

A ball of mass 1 kg is thrown vertically upwards and returns to the ground after 3 seconds. Another ball, thrown at 60^@ with vertical also stays in air for the same time before it touches the ground . The ratio of the two heights are

Two bodies of masses 1 kg and 0.5 kg move towards each other with velocities 10 cm *s^(-1) and 5 cm *s^(-1) respectively . After collision, the bodies coalesce (join together). Find the common velocity after collision and the loss in kinetic energy.

A body of mass m moving with velocity vecV collides elastically with another body B of same mass which is at rest. What will be the velocities of A and B after collision?