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Homework Statement
A sled weighing 210 N rests on a 15° incline, held in place by static friction. The coefficient of static friction is 0.50.
(c) The sled is now pulled up the incline at constant speed by a child. The child weighs 546 N and pulls on the rope with a constant force of 100 N. The rope makes an angle of 30° with the incline and has negligible weight. What is the magnitude of the kinetic friction force on the sled? (Enter 0 if sled does not move.)
N
(d) What is the coefficient of kinetic friction between the sled and the incline? (Enter 0 if sled does not move.)
(e) What is the magnitude of the force exerted on the child by the incline?
N
Homework Equations
F(normal)=mg*cos(theta)
f(kinetic)=u(kinetic)*F(normal)
The Attempt at a Solution
x: -f(kinetic)-mg*sin(theta)=-ma
y: F(normal)=mg*cos(theta)
I'm not sure where to go from here.