posted by Kishore .
Blocks A and B of weight 200N and 100N respectively, rest on a 30 inclined plane and are attached to the post which is held perpendicular to the plane by force P, parallel to the plane, Assume that all surfaces are smooth and that the cords are parallel to the plane. Determine the value of P. Also find the Normal reaction of Blocks A and B.
200*sin30 = 100 N. = Force parallel
to the plane.
Fn = 200*cos30 = 173.2 N. = Normal force
100*sin30 = 50 N. = Force parallel to
Fn = 100*cos30 = 86.6 N. = Normal force.
P = Wa+Wb = 200 + 100 = 300 N.