Two blocks are connected by a spring. combination is suspended, at rest, from a string attatched to

English

Gujarati

Hindi

4-1.Newton's Laws of Motion

normal

Two blocks are connected by a spring. The combination is suspended, at rest, from a string attatched to the ceiling, as shown in the figure. The string breaks suddenly. Immediately after the string breaks, what is the initial downward acceleration of the upper block of mass $2\,m$ ?

A

$0$

B

$3\,g / 2$

C

$g$

D

$2\,g$

Solution

After cutting $T =0$

$\therefore \quad a=\frac{3\,mg }{2\,m }=\frac{3\,g }{2}$

Standard 11

Physics

Share

Similar Questions

Block of $3\,kg$ is initially in equilibrium and is hanging by two identical springs $A$ and $B$ as shown in figures. If spring $A$ is cut from lower point at $t=0$ then, find acceleration of block in $ms ^{-2}$ at $t =0$.

normal

A man of mass $m_1$ is standing on a platform of mass $m_2$ kept on a smooth horizontal surface. If the man starts moving on the platform with a velocity $v$ relative to the platform, then recoil velocity of platform is

normal

A child is standing at one end of a long trolley moving with a speed $v$ on a smooth horizontal floor. If the child starts running towards the other end of the trolley with a speed $u$ , the centre of mass of the system (trolley + child) will move with a speed

normal

Which of the following is self-adjusting force?

normal

Two masses of $5\, kg$ and $10\, kg$ are connected to a pulley as shown. What will be the acceleration if the pulley is set free ($g =$ acceleration due to gravity)

normal