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Questions  

A block of mass 3 kg is kept on a frictional surface with μ=123. The minimum force to be applied as shown to move the block is

a
5N
b
20 N
c
10 N
d
20/3 N

detailed solution

Correct option is B

N=mg+Fsin⁡θ,Fcos⁡θ=f,f=μN

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