A 4kg mass travelling at `6ms^(-1)` along the x -axis collides with a stationary 2kg mass at rest. The velocity of centre of mass of the system is (in `ms^(-1)`)

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 bodies of masses 4kg and 2kg are moving towards each other with 3ms^(-1) and 2ms^(-1) respectively. Then velocity of centre of mass is

Two bodies of masses 3 kg and 2 kg are moving towards wach other with 3ms^(-1) and 2ms^(-1) respectively. Then velocity of centre of mass is

Two bodies of mases 5kg and 3kg are moving towards each other with 2ms^(-1) and 4ms^(-1) respectively. Then velocity of centre of mass is

A ball moving with velocity 2 ms^(-1) collides head on with another stationary ball of double the mass. If the coefficient of restitution is 0.5 , then their velocities (in ms^(-1) ) after collision will be

A body of mass 10 kg moving with speed of 3 ms ^(-1) collides with another stationary body of mass 5 kg As a result, the two bodies stick togethre. The KE of composite mass will be

A block of mass 1 kg moving with a speed of 4 ms^(-1) , collides with another block of mass 2 kg which is at rest. The lighter block comes to rest after collision. The loss in KE 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 of mass 1kg moving with 4m^-1 along +x-axis collides elastically with an another ball of mass 2kg moving with 6m//s is opposite direction. Find their velocities after collision.

An object of mass 80 kg moving with velocity 2ms^(-1) hit by collides with another object of mass 20 kg moving with velocity 4 ms ^(-1) Find the loss of energy assuming a perfectly, inelastic collision