
#1
Sep2410, 01:16 PM

P: 66

1. The problem statement, all variables and given/known data
A force of 23.52 N pushes and pulls to blocks as shown in the figure below. The vertical contact surfaces between the two blocks are frictionless. The contact between the blocks and the horizontal surface has a coefficient of friction of 0.29. The acceleration of gravity is 9.8 m/s2 What is the magnitude a of the acceleration of the blocks? Answer in units of m/s2 2. Relevant equations I know its the sum of Fy=Nmg=0 => N=mg and the sum of Fx= fk=max 3. The attempt at a solution fk=ukN=> fk=20.4624 but I do not know how to plug in Fcostheta or Fsintheta and I know those need to be used somewhere 



#2
Sep2410, 01:21 PM

PF Gold
P: 1,153

Create a free body diagram for each block, and then use ∑F=ma_{net} to find the resulting acceleration.
What forces are acting on each block? How can you use these forces to find the net force on the blocks in the x direction? 



#3
Sep2410, 01:24 PM

P: 66

in the x direction there is fk and F... On the second block in the y direction there is Fsintheta, N, and m2g in the x direction there is fk and Fcostheta... right? 



#4
Sep2410, 01:25 PM

Mentor
P: 40,905

Force pushes and pulls two blocks at an angle 



#5
Sep2410, 05:55 PM

P: 66

Thank you for you're help on my other problems too you're a live saver 


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