A block of mass 3 kg is at rest on a rou...

A block of mass 3 kg is at rest on a rough inclined plane with angle of inclination `30^@` with horizontal. If `mu_s ` = 0.7, then the frictional force is

17.82 N

1.81 N

3.63 N

2.1 N

Text Solution

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The correct Answer is:

Frictional force ` = mu mg cos theta = 0.7 xx 3 xx 9.8 cos 30^@ = 17.82 N`

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