(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

The mass of block A is 42kg, and the mass of block of B is 50kg. The surfaces are smooth. If the blocks are in equilibrium, what is the force F?

2. Relevant equations

[tex]\sum[/tex]Fx=0

[tex]\sum[/tex]Fy=0

3. The attempt at a solution

I added the vectors do this diagram. The normal force to both blocks, the weight of each box. I treated the two boxes as one whole so I wouldn't have to worry about their contact area.

I got this for my equations:

[tex]\sum[/tex]Fx= N_{A}*cos(70) + F - N_{B}=0

[tex]\sum[/tex]Fy= N_{A}*sin(70) - 42*9.81-50*9.81=0

I can solve for Na, but I can't ge to F. Help?

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# Homework Help: 2D Forces Equilibrium Question

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