A 4kg mass travelling at 6m/s along x-axis collides with a stationary 2kg mass at rest. the velocity of centre of mass of the system is

As observed in the laboratory system , a 6 MeV proton is incident on a stationary 12 C target. The velocity of centre of mass of the system is (Take mass of proton to be 1 amu)

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.

Two blocks of masses 6 kg and 4 kg are attached to the two ends of a massless string passing over a smooth fixed pulley. if the system is released, the acceleration of the centre of mass of the system will be

A body of mass 4 kg is attached to another body of mass 2 kg with a massless rod. If the 4 kg mass is at (2i + 5j)m and 2 kg mass is at (4i + 2j)m, the centre of mass of the system is at (in m)

A 10 kg mass travelling 2m /s meets and collides elastically with a 2 kg mass travelling 4 m / s in the opposite direction. Find the final velocities of both objects .

A body of mass 10 kg and velocity 10 m/s collides with a stationary body of mass 5 kg . After collision both bodies stick to each other , velocity of the bodies after collision will be

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

Centre of mass of three particles of masses 1 kg, 2 kg and 3 kg lies at the point (1,2,3) and centre of mass of another system of particles 3 kg and 2 kg lies at the point (-1, 3, -2) . Where should we put a particle of mass 5 kg so that the centre of mass of entire system lies at the centre of mass of first system ?

A ball weighing 4 kg and moving with velocity of 8 m/sec. Collides with a stationary ball of mass 12 kg. After the collision, the two balls move together. The final velocity is