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What minimum force F is required to move...

What minimum force F is required to move this 4 kg block if it acts at an angle of `45^(@)` as shown ? `(mu_(s)=0.6)`

A

(a)`60sqrt(2)`N

B

(b)`30sqrt(2)`N

C

(c)`30sqrt(3)`N

D

(d)`40 N

Text Solution

Verified by Experts

The correct Answer is:
a
`rarr F//sqrt(2)=f` for equilibrium and `N -mg +f/sqrt(2)N`
`rarr F le (mgsqrt(2)mu)/(1-mu) rarr F le 60sqrt(2)`
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