A Block of Mass M Is Pulled in the Direction $\theta$

Multiple Choice

A block of mass m is pulled in the direction shown in the figure across a rough surface at a constant velocity. The magnitude of the frictional force is

A) µ_kmg.
B) µ_kT cos $\theta$
C) µ_kT - mg) .
D) µ_kT sin $\theta$
E) µ_kmg - T sin $\theta$ ) .