`A 42 kg` girl walks along a stationary uniform beam of mass `21 kg.` She walks with a speed of `0.75 m//s.` What is the speed of the center of mass of the system of girl plus beam ?

The mass of a cannon is 500 kg and it recoils with a speed of 0.25 m//s . What is momentum of the cannon?

what is the momentum of a man of mass 75kg when he walks with a velocity of 2m//s ?

Two particle of mass 2 kg and 1 kg are moving along the same straight line with speeds 2m//s and 5m//s respectively. What is the speed of the centre of mass of the system if both the particles are moving (a) in same direction (b) in opposite direction ?

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

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 body of mass 5kg is moving along a circle of a radius 1 m with a uniform speed of 5 m/s .What is the acceleration of body?

A body of mass 10 kg moving at a height of 2 m, with uniform speed of 2 m/s. Its total energy is

Two particles of mass 1kg and 2kg are moving along the same line with speeds 2m//s and 4m//s respectively. Calculate the speed of the centre of mass of the system if both the particles are moving in the same direction.

Two particles of mass 1kg and 2kg are moving along the same line with speeds 2m//s and 4m//s respectively. Calculate the speed of the centre of mass of the system if both the particles are moving in the same direction.