For the system at rest shown in fig. assume that the threads are weightless, the mass of the pulley is negligible small. and there is no friction at the point of suspension. All threads are tight Immediately after the lower thread keeping the system in equilibrium has been cut choose the correct options

The acceleration of the load

m_{1}

is 0

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The acceleration of the load

m_{2}

is 0

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The acceleration of the load

m_{3}

is 0

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The acceleration of the load

m_{4}

\frac{(- m_{3} - m_{4} + m_{1} + m_{2}) g}{m_{4}}

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Solution

The correct option is C The acceleration of the load $m_{3}$ is 0
$\begin{matrix} T h e r e i s n o c h a n g e i n f o r c e o n m_{3} ∴ a c c e l e r a t i o n o f m_{3} i s z e r o H e n c e, o p t i o n C i s c o r r e c t a n s w e r . \end{matrix}$

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Q. Four blocks and two springs are arranged as shown in

F i g . 6.213

the system at rest, determine the acceleration of all the loads immediately after the lower thread keeping the system in equilibrium has been cut. Assume that the threads are weightless, the mass of the pulley is negligible small, and there is no friction at the point of suspension.

Four blocks and two springs are arranged as shown in figure. The system is at rest. Determine the acceleration of all the loads immediately after the lower thread keeping the system in equilibrium has been cut. Assume that the thread and pulleys are weightless and there is no friction at the point of suspension.