Q. Three equal weights of each are hanging on a string passing over a frictionless pulley as shown in figure. The tension in the string between masses II and III will be (Take ) Physics Question Image

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Solution:

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Three equal weights of each are hanging on a string passing over a pulley as shown in figure.
If a is the common acceleration.
(For mass I)
(For mass II)
(For mass III)
Adding, above three equations