Homework Help: physics

Posted by Tina on Wednesday, June 22, 2011 at 8:32pm.

How can I find kinetic friction (Fk) without mu? I know the normal force which is 201N. The mass of the object is 30kg.
This is the full questions of it helps. I just don't understand how to find kinetic friction

1. If a 30kg object experiences a normal force of 210N when traveling down a ramp, what is the angle of incline? Also, calculate the force of friction and the coefficient of friction.
Answers: μ(mu)=0.98
Θ=44.5 degrees

physics - Count Iblis, Wednesday, June 22, 2011 at 8:54pm
In this problem, you have to assume that the object slides at some constant velocity (i.e. it is not accelerating). This means that the force of friction is the opposite of the component of the force of gravity along the incline.

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