To determine the smallest possible separation l between masses to prevent any contact between any of the 3 components of the mechanism in Matlab, we need to first define the components of the mechanism and their dimensions. Let's assume that we have three masses, m1, m2 and m3 and they are connected by three rods of length L1, L2 and L3 as shown in the figure below.

We can then define the position vectors of the three masses with respect to a fixed reference frame as follows:
main.m42 chars4 lines
where x1, y1, x2, y2, x3, and y3 are the x and y coordinates of masses m1, m2 and m3.
Next, we can use the distance formula to calculate the distance between any two masses as follows:
main.m60 chars4 lines
where d12, d23 and d13 are the distances between masses m1 and m2, m2 and m3, and m1 and m3, respectively.
Finally, we can calculate the smallest possible separation l between masses to prevent any contact between any of the 3 components of the mechanism as follows:
main.m42 chars2 lines
where L1, L2 and L3 are the lengths of the three rods that connect the three masses.
Here's the full code in Matlab:
main.m308 chars13 lines
Note that the values of x1, y1, x2, y2, x3, y3, L1, L2, and L3 must be specified based on the specific problem that you are trying to solve.
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