Physics question below?

Question

A skier is pulled up a slope at a constant velocity by a tow bar. The slope is inclined at 23.0° with respect to the horizontal. The force applied to the skier by the tow bar is parallel to the slope. The skier's mass is 52.0 kg, and the coefficient of kinetic friction between the skis and the snow is 0.190. Find the magnitude of the force that the tow bar exerts on the skier.

Answer 1

The normal component of the skier's weight is m*g*cos(A). The friction is then µs*m*g*cos(A). The weight component is m*g*sin(A) (do these formulas look familiar?) The tow bar must apply the sum of these forces.