Physics help...?

Question

Hi, I was just needing some help with my physics homework because my teacher tends to get off subjetc and doesn't teach us how to do it, Anywho...

☺How do you find the coefficient of sliding friction if the horizontal force, mass, and acceleration is given?

☺How do you find the acceleration of an object given the applied horizontal force, mass, and coefficient of friction?

Thank you very much!

Answer 1

The accelerating force is applied force F minus frictional force µ*m*g, where µ is the coefficient of friction.. So accelerating force Fa = F - µ*m*g; Fa = m*a, so m*a = F - µ*m*g; solve for µ:

µ = (F - m*a)/(m*g)

The same holds for the second part: The (mass times acceleration) = (horizontal force - frictional force):

m*a = F - µ*m*g; Then a = (F - µ*m*g)/m

Answer 2

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Answer 3

i don't really know i just want the points and i dont know :) so dont ask this ever again because you said like a nerd and i dont think you want people to think you r a nerd :)

Answer 4

http://www.roymech.co.uk/Useful_Tables/Tribology/co_of_frict.htm