Newtons Third Law Involving three objects

[ImranyZ]

Homework Statement

Three boxes, A, B, C, are positioned next to each other on a friction-less surface, an applied force acting on box A causes all the boxes to accelerate at 1.5 m/s/s. Calculate the force exerted by box C on box B. ma= 8 kg mb=10 kg mc= 5 kg

Homework Equations

Fnet=MA

The Attempt at a Solution

Fa=FNet-FconB
10.0 kg(1.5 m/s/s)-5.0kg(1.5m/s/s)=FNet

I am unsure if I am right

 

[jedishrfu]

First step, try drawing a free body diagram.

Second compute Fnet which is moving the three masses at 1.5m/s/s.

 

[paisiello2]

Maybe you could explicitly define your terms?

I would recommend to do a free body diagram for each of the following:
1) the entire block a+b+c system
2) block a by itself
3) block b by itself