Force exerted on one object by another

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AI Thread Summary
To determine the force exerted by block 1 on block 2, Newton's Second Law is applied, with the system's acceleration known to be 6.36 m/s². The tension in the cord connecting blocks 1 and 3 is calculated to be 22.27 N. A clearer understanding of the setup, including the arrangement of blocks, ropes, and pulleys, is necessary for solving the problem. The user expresses confusion about the mechanics involved, particularly since the image of the setup is not displaying properly. Clarification on the connections and forces at play is essential for finding the solution.
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Homework Statement


http://lon-capa.bsu.edu/res/brookscole/serway/College_Physics_7ed/serwaypictures/sf4_27.jpg

m1=1.2kg
m2=2.3kg
m3=3.1kg
a[of the system] determined to be = 6.36m/s^2
T[between the cord of 1-->3] determined to be =22.27N

Determine the force exerted by the number 1 block on the number 2 block.

Homework Equations


Newton's Second Law, I imagine; sigma F = mass*acceleration

The Attempt at a Solution


if the two were connected via a cable or something, I'd get how to do it; as stands, I'm not really sure. we've only went over this briefly, so I'm quite stumped.
any help would be appreciated, however!
 
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A clearer explanation of the setup of all blocks, ropes, and pulleys would be helpful.
 
I put up an image showing it, but it isn't displaying, now.
I'll put it up again.
http://img163.imageshack.us/img163/9191/sf427.jpg
 
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