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Questions  

In the figure, pulleys are smooth and strings are massless, m1 = 1 kg and  m2=13 kg To keep m3 at rest, mass m3 should be

a
1 kg
b
23 kg
c
14 kg
d
2 kg

detailed solution

Correct option is A

m3 is at rest. Therefore,2T = m3 g                                                                                               …(i)Further, if m3 is at rest, then pulley P is also at rest.Writing equations of motion, m1g - T = m1a                                        …(ii)                                         T - m2g = m2a                                            …(iii)Solving Eqs. (i), (ii) and (iii), we get                                                  m3 = 1 kg

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Similar Questions

A constant force F = m2g/2 is applied on the block of mass m1 as shown. The string and the pulley are light and the surface of the table is smooth. Find the acceleration of m1.


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