Question:medium

In the arrangement shown in figure a1a2a3 and a4 are the accelerations of masses m1m2m3 and m4 respectively. Which of the following relation is true for this arrangement
 
Masses
Fig. 

Updated On: Mar 20, 2026
  • 4a1 + 2a2 + a3 + a4 = 0
  • a1 + 4a2 + 3a3 + a4 = 0
  • a1 + 4a2 + 3a3 + 2a4 = 0
  • 2a1 + 2a2 + 3a3 + a4 = 0
Show Solution

The Correct Option is A

Solution and Explanation

To solve this problem, we must understand the arrangement involving multiple pulleys and masses. By analyzing the system, we can establish the relationship between the accelerations of the masses.

Masses
Fig. - Pulley and Mass System

In this system, the tension in the ropes and the accelerations of the masses are interrelated. We examine each mass and apply Newton's second law to find these relationships.

  • Let T_1 be the tension in the rope attached to mass m_1.
  • Similarly, let T_2, T_3, and T_4 be the tensions corresponding to masses m_2, m_3, and m_4 respectively.

By applying Newton's second law (F = ma) to each mass and considering the constraints of the pulley system, we derive a relationship between their accelerations:

  • The acceleration constraint for the system is derived from the fact that the total movement in one part of the rope must be counteracted by movement in other parts due to the pulleys.

After analyzing the system, the equation that correctly represents the relationship between these accelerations is:

4a_1 + 2a_2 + a_3 + a_4 = 0

This equation indicates a balance of movements within the system, ensuring the physical constraints of the ropes and pulleys are satisfied. Thus, this relationship holds true.

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