Problem 5-102 Friction force

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.


Which is the correct FBD for the skier?

Four possible FBD of the skier.

(A)

(B)

(C)

(D)