8–94.
841A
A minimum force of lb is required to hold the
cylinder from slipping against the belt and the wall.
Determine the weight of the cylinder if the coefficient of
friction between the belt and cylinder is and
slipping does not occur at the wall.
SOLUTION
Equations of Equilibrium:Write the moment equation of equilibrium about point
Frictional Force on Flat Belt:Here, T1= 50 lb,
ms=0.3
P=50
BA
0.1 ft
30
O
8–95.
841B
The cylinder weighs 10 lb and is held in equilibrium by the
belt and wall. If slipping does not occur at the wall,
determine the minimum vertical force Pwhich must be
applied to the belt for equilibrium. The coefficient of static
friction between the belt and the cylinder is ms=0.25.
SOLUTION
Equations of Equilibrium:
BA
0.1ft
30°
O