1. The problem statement, all variables and given/known data Three blocks are placed onto a frictionless horizontal surface. These blocks are side by side and are in contact with each other. Let m1=2m2=5m3. Answer the following exercises. (Part 1) a)If a force is applied to m1, then show that i)Fa = 17/2m3a ii)F12 = 7/2m3a where F12 is the contact force of mass 1 on mass 2 iii)F23=m3a Question: Consider the same three blocks as in the question above. If these blocks rest upon a rough floor (μ=0.11), show that if a force is applied to m1, then: (Part 2) i)Fa = 17/2 m3(a+μg) ii)F12 = 7/2 m3(a+μg) iii)F23 = m3(a+μg) 2. Relevant equations Σ Fx = ma 3. The attempt at a solution All in all both questions (part 1 and part 2) are more or less the same except this question (part 2) includes the force of friction while the other (part 1) does not. I have already solved all the questions for part 1, and where I am having difficulty is, is in getting rid of the mass (m) in "μmg" for this question so that I could get the values as seen above.