A block of mass m is connected with another block of mass 2m by a light spring. 2m is connected with a hanging mass 3m by an inextensible light string. At the time of release of block 3m?

Q. A block of mass $m_1$ is connected with another block of mass $m_2$ by a light spring. $m_2$ is connected with a hanging mass $m_3$ by an inextensible light string. At the time of release of block $m_3$:

Q. Three blocks with masses $m,2m$ and $3m$ are connected by strings, as shown in the figure. After an upward force $F$ is applied on block $m,$ the masses move upward at constant speed $v$. What is the net force on the block of mass $2m?$ ($g$ is the acceleration due to gravity)

Q. Two block of masses m and 2m are connected by a light string passing over a frictionless pulley.As shown in figure, the mass m is placed on a smooth inclined plane of inclination 30${}^o$ and mass 2m hangs vertically .If the system is realesed ,the blocks move with an acceleration equal to:

Q. Three masses $m$, $2m$ and $3m$ are attached with light strings passing over a fixed frictionless pulley as shown in the figure. The tension in the string between $2m$ and $3m$ is ($g$ is acceleration due to gravity)