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In the figure given, two masses of 5 kg and 10 kg are attached to a massless string and the string passes over an ideal frictionless pulley. The system is released from the rest at t = 0 sec. Find the work done by the string on the mass of 5 kg during the time t = 1 sec, just after releasing the system from the rest.

(use acceleration due to gravity, g = 10 m/s2)
  • a)
    -50 J
  • b)
    -111 J
  • c)
    50 J
  • d)
    111 J
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
In the figure given, two masses of 5 kg and 10 kg are attached to a ma...
From the FBD below

Acceleration of the blocks in the given problem

From the equation of motion

From FBD
Let the tension in the string is T

Work done by tension
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Community Answer
In the figure given, two masses of 5 kg and 10 kg are attached to a ma...
Option d
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In the figure given, two masses of 5 kg and 10 kg are attached to a massless string and the string passes over an ideal frictionless pulley. The system is released from the rest at t = 0 sec. Find the work done by the string on the mass of 5 kg during the time t = 1 sec, just after releasing the system from the rest.(use acceleration due to gravity, g = 10 m/s2)a)-50 Jb)-111 Jc)50 Jd)111 JCorrect answer is option 'D'. Can you explain this answer?
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