For the system shown in Fig. the string is light and pulley is frictionless. The `4 kg` block is given an upward velocity of `1 m//s`. The centre of mass of the two blocks will [neglect the impulse duration]

In the system shown in fig the pulley is frictionless and the string massless if m_(1)=m_(2) thrust on the pulley will be:

For the following system shown assume that pulley is frictionless, string is massless (m remains on M), Q. The acceleration of the block A is

For the following system shown assume that pulley is frictionless, string is massless (m remains on M), Q. The acceleration of the block A is

For the following system shown assume that pulley is frictionless, string is massless (m remains on M), Q. The acceleration of the block A is

In the system shown all the surfaces are frictionless while pulley and string are massless. The mass of block A is 2m and that of block B is m. The acceleration of block B immediately after system is released from rest is

In the system shown all the surfaces are frictionless while pulley and string are massless. The mass of block A is 2m and that of block B is m. The acceleration of block B immediately after system is released from rest is

Two blocks of masses 10 kg and 4 kg are connected by a spring of negligible mass and placed on a frictionless horizontal surface. An impulse gives a velocity of 14 m//s to the heavier block in the direction of the lighter block. The velocity of the centre of mass is