Two masses are at rest on a plane inclined at angle s=35° above horizontal. A cord from mass A=4 kg, passes over a frictionless pulley at the top of the plane to unknown mass B. The coefficient of friction is f= .25.
See attachment for picture showing blocks and plane.
a. Find the maximum mass of B for the masses to remain in place.
b. Find the minimum mass of B for the masses to remain in place.
a. Solution for finding maximum mass B:
See solution attachment for picture showing forces.
Gravitational force on B has component 'B g sin s' tending to move mass B down the plane and mass A up the plane. The force opposing downward motion of B is friction force component 'f B g cos ...