A girl of mass 25 kg running with a speed of 1.5 m/s jumps on a skateboard of mass 2 kg kept on a smooth surface. What will be their combined velocity?

A girl of mass 25 kg running with a speed of 1*5 m/s jumps on a skateboard of mass 2 kg kept on a surface . What will be their combined velocity ?

What will be the net acceleration of a given block of mass 2kg kept on a smooth surface?

A body of mass 5 kg moving with a speed of 1.5 m/s on a horizontal smooth surface collides with a nearly weightless spring of force constant k = 5 N/m. The maximum compression of the spring would be

A ball mass 2 kg moving horizontally with velocity 10 m/s hits a wedge of mass 5 kg placed on a horizontal surface as shown in the figure. Just after collision klvelocity of wedge is 3.2 m/s. There is no friction at any contact surface. Then (take sin 30^(@)=3//5 )

A boy of mass 25 kg stands on a board of mass 10 kg which in turn is kept on a frictionless horizontal ice surface. The boy makes a jump with a velocity component 5m/s in a horizontal direction with respect to the ice. With what velocity does the board recoil? With what rate are the boy and the board seperate from each other?

A ball of mass 2kg moving with speed 5m/s collides directly with another ball of mass 3kg moving in the same direction with speed 4m/s. The coefficient of restitution is 2/3. Find the velocities of both ball after the collision.

A bullet of mass 0.1 kg is fired with a speed of 100 m//sec , the mass of gun is 50 kg . The velocity of recoil is

A bullet of mass 0.1 kg is fired with a speed of 100 m//sec , the mass of gun is 50 kg . The velocity of recoil is

Two particles of mass 1 kg and 0.5 kg are moving in the same direction with speed of 2 m//s and 6 m/s respectively on a smooth horizontal surface. The speed of centre of mass of the system is

A man of mass 60kg jumps from a trolley of mass 20kg standing on smooth surface with absolute velocity 3m//s . Find velocity of trolley and total energy produced by man.