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Questions  

Two objects A and B, each of mass m, are connected by a light inextensible string. They are restricted to move on a frictionless ring of radius R in a vertical plane (as shown in the figure). The objects are released from rest at the position shown. Then the tension in the cord just after release is 

a
Zero
b
mg
c
2mg
d
mg/2

detailed solution

Correct option is D

As shown in Figs. (a) and (b) from FBD of A,Tcos⁡45∘=ma   ......(i)From FBD of .B:Mg−Tcos⁡45∘=ma   .....(ii)From (i) and (ii), we get T=mg/2

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