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Concept of Force

A Spring scal...

Question

A Spring scale indicates a tension T in the right hand cable of the pulley system shown in figure. Neglecting the mass of the pulleys and ignoring friction between the cable and pulley the mass m is

A

2T/g

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B

T (1 + e^{4 π}) / g

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C

4T/g

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D

None of these

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Solution

The correct option is C 4T/g
The free body diagram of mass m

In equilibrium condition,
4T = mg
or $m = \frac{4 T}{g}$

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