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disque

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## Homework Statement

Three blocks rest on a frictionless, horizontal table (see figure below), with m1 = 8 kg and m3 = 15 kg. A horizontal force F = 104 N is applied to block 1, and the acceleration of all three blocks is found to be 3.2 m/s2.

## Homework Equations

W=mg

F=ma

Normal Force=Weight (horizontal surface)

## The Attempt at a Solution

First off, I had to find the mass of the second block which was just 9.5, but the second part of the problem wants me to find the normal force between blocks 2 and 3. I thought you just added the weights of the two together which gave me 240.1(240 w/ sig figs) but that was wrong. I am thinking I have to incorporate the force they gave me somewhere in the problem, the problem is just where? Please help if you have time I would appreciate it. Thanks a lot. I attached the picture given too by the way.