HELP PLEASE!!!! How do I calculate the coefficient of static friction given the mass of the object(kg), Fs(N) and Fk(N)?

Question

roadjester · Answer

$$\huge f_s\le \mu_sn$$
what do all of your symbols stand for? can you put that in words?

anonymous · Answer

Fs is for static friction I think and Fk is Kinetic Friction :(

roadjester · Answer

I meant, to reword your question so I know what is given.

anonymous · Answer

It says to Perform the calculations and enter the data in your table

roadjester · Answer

do you have a diagram?

anonymous · Answer

Yes

anonymous · Answer

Sorry, I just need to load it :(

anonymous · Answer

attachment

roadjester · Answer

are we assuming that all of these "objects" are on flat surfaces?

anonymous · Answer

Yes going horizontal :(

roadjester · Answer

good

roadjester · Answer

that makes everything easy

roadjester · Answer

$$\huge F_s = \mu_s n = \mu_smg$$
$$\huge \mu_s= \frac {F_s} {mg} $$
does that make sense

anonymous · Answer

whats the n?

roadjester · Answer

n is the normal force and is opposite mg

roadjester · Answer

n=mg only works if the surface is flat

roadjester · Answer

that's why I asked if the surface was flat
if you're on an inclined plane, then you need to involve trig and it get's messy

anonymous · Answer

Ohhhhhhh alright! Thank you so much! :) does it also go for Kinetic Friction?

roadjester · Answer

the symbols are different but yes
$$\huge \mu_k={F_k \over mg}$$

anonymous · Answer

Okay, so Static Friction = Coefficient Static Friction x normal force = Us massxgravity?

roadjester · Answer

yep

anonymous · Answer

Okay, Thank you SO much!!!

roadjester · Answer

did you still need help? you bunped the question...