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The pulleys and strings shown in the fig...

The pulleys and strings shown in the figure are smooth and of negligible mass. For the system to remain in equilibrium, the angle `theta` should be

A

(a)`0^(@)`

B

(b)`30^(@)`

C

(c)`45^(@)`

D

(d)`60^(@)`

Text Solution

Verified by Experts

The correct Answer is:
c
For vertical equilibrium of the block `f= mg =0.98 N lt (f)_(max) sqrt(2)mg =2T cos theta =2 (mg) cos theta `
`because` T=m g at equilibrium )
`because T=mg therefore cos theta =(1)/sqrt(2) rar theta =45^(@)`
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