Coefficient of Kinetic Friction lab question

AI Thread Summary
The discussion revolves around finding the coefficients of kinetic friction for wood against rubber and steel against wood for a lab experiment. The user has struggled to locate these specific values despite extensive online searches. They have successfully found a helpful link but are still seeking the coefficient for rubber against wood. Participants are encouraged to provide known values or direct the user to reliable resources. Accurate coefficients are essential for completing the lab calculations effectively.
jman1114
Messages
3
Reaction score
0
Hey,

New here so I don't know if I'm posting this in the right area if I'm not please redirect me. I have this lab on static and kinetic coefficients of friction. One of the discussion questions is what are the expected or known values for wood against rubber and steel against wood. Basically the lab was drag a rubber stopper and a metal puck across a wooden board and then calculate the coefficient (I know easy). But I can't find the coefficient of kinetic friction for each of those two and I've looke at 20 or 30 websites. So my question is could someone either point me in the right direction or show me a website that has the values because I'll need it for referencing.
 
Physics news on Phys.org
Thanks a lot for that link it really helped. But does any possibly off the top of their head know what rubber against wood might be?
 
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
Thread 'Collision of a bullet on a rod-string system: query'
In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
Thread 'A cylinder connected to a hanging mass'
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...
Back
Top