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Motion Of Connected Blocks Over Pulley - Practice Questions & MCQ

Edited By admin | Updated on Sep 18, 2023 18:34 AM | #JEE Main

Quick Facts

  • Motion of connected blocks over pulley is considered one the most difficult concept.

  • 18 Questions around this concept.

Solve by difficulty

A light string passing over a smooth light pulley  connects two blocks of masses m1 and m2  ( vertically) .  If the acceleration of the system is g/8,  then the ratio of the masses is

Two masses of 10 kg and 9 kg are connected by a string that passes over a smooth pulley; What is the tension in the string \left ( g=9.81ms^{-2} \right )                                                 

Calculate the acceleration of the system as shown in the figure , assume all the surfaces are smooth 

 

Concepts Covered - 2

Motion of connected blocks over pulley

 

 

Equation of motion for   m_{1}

F_{net}=T-m_{1}g=m_{1}a

Equation of Motion for   m_{2}

F_{net}=m_{2}g-T=m_{2}a

a=\frac{[m_{2}-m_{1}\:]g}{m_{1}+m_{2}}

T=\frac{2m_{1}m_{2}\:g}{m_{1}+m_{2}}

When one Block is hanging from a rope and one on the table
  1. When one Block is hanging, other is on the Table

 

           

            a=\frac{m_{2}\:g}{m_{1}+m_{2}}


          T=\frac{m_{1}m_{2}\:g}{m_{1}+m_{2}}

 

  1. Three blocks, two are hanging and one is at the rest on the smooth horizontal table

   

 

      

m_1a=m_1g-T_1

m_2a=T_2- m_2\:g

T_1-T_2=Ma

 

a=\frac{(m_1-m_2)g}{m_1+m_2+M}


T_1=\frac{m_1(2m_2+M)\:g}{(m_1+m_2+M)}


T_2=\frac{m_2(2m_1+M)\:g}{(m_1+m_2+M)}

 

 

 

 

 

Study it with Videos

Motion of connected blocks over pulley
When one Block is hanging from a rope and one on the table

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