A small ball of mass 1kg strikes a wedge of mass 4kg horizontally with a velocity of `10m//s`. Friction is absent everywhere and collision is elastic. Select the incorrect answer:

A ball of mass 1kg strikes a wedge of mass 4kg horzontally with a velocity of 10m//s . Just after collision, velocity of wedge becomes 4m//s .Friction is absent everywhere and collision is elastic. Select the correct alternative.

A ball of mass 1kg strikes a wedge of mass 4kg horzontally with a velocity of 10m//s . Just after collision, velocity of wedge becomes 4m//s .Friction is absent everywhere and collision is elastic. Select the correct alternative.

A boat of mass 40kg is at rest. A dog of mass 4kg moves in the boat with a velocity of 10m//s . What is the velocity of boat (nearly)?

A block of mass m slides down on inclined wedge of same mass m as shown in figure . Friction is absent everywhere . Acceleration of centre of mass of the block and wedge is

A block of mass m slides down on inclined wedge of same mass m as shown in figure . Friction is absent everywhere . Acceleration of centre of mass of the block and wedge is

A block of mass m slides down on inclined wedge of same mass m as shown in figure . Friction is absent everywhere . Acceleration of centre of mass of the block and wedge is

A ball of mass 10 kg is moving with a velocity of 10 m / s . It strikes another ball of mass 5 kg which is moving in the same direction with a velocity of 4 m / s . If the collision is elastic, their velocities after the collision will be, respectively

A ball of mass 1 kg strikes a heavy plarform elastically, moving upwards with a velocity of 5 m//s . The speed of the ball just before the collision is 10 m//s downwards. Then the impulse imparted by the platform on the ball is

A ball of mass 1 kg strikes a heavy plarform elastically, moving upwards with a velocity of 5 m//s . The speed of the ball just before the collision is 10 m//s downwards. Then the impulse imparted by the platform on the ball is

A ball of mass 1 kg strink a heavy platform, elastically, moving upwards with a velocity of 5 m//s . The speed of the ball just begore the collision is 10 m//s downwards. Then the impulse imparted by the platform on the ball is :-