Problem 5-102 Friction force - Part 3 - D

A skier of mass \(79\; kg\) is sliding at constant velocity down a slope inclined at \(8.3^\circ\) to the horizontal. Determine the magnitudes of:

(a) the normal force exerted on the skier.
(b) the frictional force exerted on the skier.

Accumulated Solution

FBD of skier

FBD

\(a_x = a_y = 0\)

Correct.

There is no acceleration in this problem in any direction.
Which is the expression for the sum of the forces in the \(x\) direction?

(A)   \(mg \sin \theta + F_f\)

(B)   \(mg \cos \theta + F_f\)

(C)   \(mg \sin \theta - F_f\)

(D)   \(mg \cos \theta - F_f\)