Which one of the following gives the magnitude of the kinetic friction acting on a…

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

Problem

Which one of the following gives the magnitude of the kinetic friction acting on a block of mass

m

that is sliding down a rough plane inclined at an angle

\theta

to the horizontal? (

\mu_k

is the coefficient of kinetic friction.) (a)

\mu_k m g \sin\theta

(b)

m g \sin\theta

(c)

\mu_k m g \cos\theta

(d)

\frac{\mu_k m g}{\cos\theta}