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Homework Statement
A girl pushes a shovel at uniform velocity across a sidewalk.
The handle of the shovel is inclined at 55degrees to the horizontal
and the girl pushes the handle with a force of 100N.
What is the friction and what is the coefficient of kinetic friction.
Given Information from said Question:
For both the girl and the shovel
a= 0m/s2;uniform velocity
Fappx = 100cos55
Fappy = 100sin55
Not Given Information:
Mass, therefore gravity nor normal force can be calculated. But we don't need either as far as I know.
Homework Equations
Fk=Fappx (in this instance, because Fnetx is equal to 0 due to acceleration)
I don't know an equation for the coefficient of kinetic friction..
The Attempt at a Solution
I solved for force of friction; that was an easy one.
Fk=100cos55
Fk=57.36N[<--] (the direction is from my FBD assuming --> is positive)
I've never heard of "the coefficient of kinetic friction", and we definatly did not learn it in class. A quick use of google didn't give me the exact answer I needed. I then turned to wikipedia (as i love it and it's never let me down), which then told me http://en.wikipedia.org/wiki/Friction#Coefficient_of_friction"
Since i don't exist where this question takes place, and don't have her shovel or what it's made of I can't do this experimentally. So if I can't calculate it, and I can't measure it myself, how exactly do i find the coefficient of kinetic energy. What does the coefficient of kinetic energy actually mean?
Much thanks ^^
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