That the normal force must equal the gravitational force?
I've solved the problem (a) and (b).
Now I need help with problem (c). What are the total forces acting on M1?
Is it the mass of M2 minus the coefficient of friction of M1?
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Homework Statement
Problem one on this pdf file.
http://www.dtfizzix.com/APEXAMS/Phackets/B-1987-Exam.pdf
Homework Equations
F=ma
ΣFx= ma
The Attempt at a Solution
ΣFx= (m1+m2)a
What are the total forces on of the block labeled M1?