A block is at rest on a rough inclined plane and is connected to an object with the same mass as
shown. The rope may be considered massless; and the pulley may be considered frictionless.
The coefficient of static friction between the block and the plane is us; and the coefficient of
kinetic friction is
m
m
90. What is the magnitude of the static frictional force acting on the block?
A) mgsin ?
B) mg cos
C) mg(1-sin
D) mg(1
-
cos
E) mg