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What is the maximum value of the force F...

What is the maximum value of the force F such that the block shown in the arrangement, does not move ?

A

20N

B

10N

C

12N

D

15N

Text Solution

Verified by Experts

The correct Answer is:
A
`f= F cos60^(@)`
`N=F sin 60^(@)+mg`
`implies mu N=F cos 60^(@)`

`implies (1)/(2sqrt(3))xx(Fxx(sqrt(3))/(2)+sqrt(3)xx10)=Fxx(1)/(2)`
`implies(F)/(4)+5=(F)/(2)implies(F)/(4)=5impliesF=20N`.
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