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

In the system shown in the figure below, a horizontal force x acts on the 7.00 kg object (m1). The horizontal surface is frictionless.

I solved the first part.

(a) For what values of Fx does the 4.00 kg object (m2) accelerate upward?

F_{x}> 39.24 N

I am totally confused on the second part.

(b) For what values of Fx is the tension in the cord zero?

F_{x}[tex]\leq[/tex] ?

2. Relevant equations

[tex]\sum[/tex]F=ma

(I don't think any other equations play a role.)

3. The attempt at a solution

I would think that for the tension to the zero, the F_{x}should be opposite value of the weight of m_{2}. So -39.24 N. However, that's not right. I am confused about what forces are acting on the objects.

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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# What values of F make the tension zero?

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