Two blocks $A$ and $B$ are connected by a massless string (shown in the figure). A force of $30\text{N}$ is applied to block $B$. The distance travelled by centre of mass of the system in $2\text{s}$ starting from rest is

Q. Two blocks $A$ and $B$ are connected by a massless string ( shown in figure) . $A$ force of $30N$ is applied on block $B$ . The distance travelled by centre of mass in $25$ starting from rest is

Q. Two blocks $A$ and $B$ are connected by a massless string (shown in the figure). A force of $30\text{N}$ is applied to block $B$. The distance travelled by centre of mass of the system in $2\text{s}$ starting from rest is

Q. A system of two blocks A and B are connected by an inextensible massless string as shown in figure. The pulley is massless and frictionless. Initially, the system is at rest. A bullet of mass 'm' moving with a velocity 'u' as shown hits block 'B' and gets embedded into it. The impulse imparted by tension force to the block of mass 3m is :

Q. A system of two blocks $A$ and $B$ are connected by an inextensiible massless string as shown in figure. The pulley is massless and frictionless. Initially, the system is at rest. A bullet of mass $m$ moving with a velocity $u$ as shown in the figure hits block $B$ and gets embedded into it. Then find out the impulse imparted by tension force to the block of mass $3m$, immediately after the collision takes place.

Q. Two blocks $A$ and $B$ of masses $3m$ and $m$ respectively are connected by a massless and inextensible string. The whole system is suspended by a massless spring as shown in figure. The magnitudes of acceleration of $A$ and $B$ immediately after the string is cut, are respectively: