Which expression gives the magnitude of the kinetic friction force acting on a block…

PHYSICS · Single correct · AP · Physics 1: Algebra-based · Force and Translational Dynamics · Force and Translational Dynamics

Problem

Which expression gives the magnitude of the kinetic friction force acting on a block of mass

m

that slides down a rough plane inclined at an angle

\theta

to the horizontal? (a)

\mu_k m g \sin\theta

(b)

\mu_k m g \cos\theta

(c)

m g \sin\theta

(d)

\mu_k m g