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 boy of mass 50 kg running at 5 m/s jumps on to a 20 kg trolley travelling in the same direction at 1.5 m/s. What is their common velocity ?

A boy of mass 60 kg running at 3//s jumps on to a trolley of mass 140 kg moving with a velocity of 1.5m//s in the same direction . What is their common velocity?

A bullet of mass 20 gram is fired horizinatally with a speed of 150 m//s from a pistol of mass 2.5kg. What is the recoil velocity of the pistol ?

A bullet of mass 50 kg is fired with a speed of 200 m//s from a gun of mass 2 kg . Find the recoil velocity of the gun.

A mass of "2kg" moving at "6m/s" collides and sticks to a mass of "4kg" ,resting on a smooth surface.Find their speed after collision.

(i) How much momentum will a dumb-bell of mass 10kg transfer to the floor if it falls a height of 80 cm ? Take its downward acceleration to be 10 m//s^(2) . (b) A girl of mass 40 kg running at a speed of 5m//s horizontally jumps onto a stationary cart with frictionless wheels. The mass of the cart is 3 kg . What is her velocity as the cart starts moving?

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