How Do You Calculate the Coefficient of Friction?

AI Thread Summary
To calculate the coefficient of friction, divide the frictional force by the normal force. In this case, a force of 150 newtons is required to overcome the friction for a weight of 600 newtons. The coefficient of friction can be found using the formula: coefficient of friction = frictional force / normal force. Therefore, the coefficient of friction is 150 N / 600 N, which equals 0.25. Understanding the relationship between these forces is crucial for solving similar problems.
liz777
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Homework Statement


If a force of 150 newtions is needed for a 600 Newton weight to overcome friction, what is the coefficient of friction?

The Attempt at a Solution


I'm really confused, I drew a force diagram but it didnt help. I know I need to get the frictional force to solve for the coefficient of friction, but I'm not sure how to get it...
 
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This is the same issue as in your other thread. See my comments there. The friction is given.
 
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Thread 'A cylinder connected to a hanged mass'

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Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
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