Three masses of $6$ kg, $4$ kg and $2$ kg are attached to a rigid support as shown in figure. If the string attached to the support breaks and the system falls freely then what is the tension in the string connecting $4$ kg and $2$ kg mass ? If whole system is accelerating in upwards direction with $2$ $m / s^{2}$ , what is the tension in each rope?

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Solution

When the system is falling freely, there is no tension in the string.

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