The velocities of three particles of masses 20 g, 30 g and 50 g are `10hat`i, `10hatj` and `10hatk` respectively. The velocity of the centre of mass of the three particles is

The velocities of three particles of masses 20g, 30g and 50g are 10hati,10hatj " and " 10hatk respectively. The velocity of the centre of mass of the three particles is

Two objects of masses 200g and 500g have velocities of 10i m//s and (3i + 5j) m//s respectively. The velocity of their centre of mass is

Two objects of masses 200 g and 500 g possess velocities 10hati ms^(-1) and 3hati+5hatj ms^(-1) respectively. The velocity of their centre of mass in ms^(-1) is

Particles of masses 10 g and 20 g have position vectors (5,3,0) and (2,0,3) respectively. The position vector of their centre of mass is ………… cm.

Three particles with masses 10, 20 and 40gm are moving with velocities 10hati, 10hatj and 10hatk m/sec respectively. If due to some interaction the first particle comes to rest and the velocity of second becomes ) (3hati+4hatj) m/sec. then the velocity of third particle after the interaction is-

Two bodies of 6 kg and 4 kg masses have their velocity 5hati-2hatj+10hatj and 10hati-2hatj+5hatk respectively. Then, the velocity of their centre of mass is