(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

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

2. Relevant equations

F(normal)=mg*cos(theta)

f(kinetic)=u(kinetic)*F(normal)

3. 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.

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# Homework Help: Static and kinetic friction on an incline

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