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

A block of mass 3 kg is at rest on a rough inclined plane with angle o

1.	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
Answer» 17.82 N 1.81 N 3.63 N 2.1 N Solution :FRICTIONAL FORCE ` = mu mg COS theta = 0.7 XX 3 xx 9.8 cos 30^@ = 17.82 N`