- #1

- 143

- 0

## Homework Statement

Two blocks are lined up in a row. Block A a mass of 1kg, and Block B with a mass of 2kg. If block a is A is pushed forward by 12N, how much force does Block B exert on Block A. Friction can be nelected.

## Homework Equations

Newtons Third law

F(A on B)=-F(B on A)

For the system of A:

[tex]F_{Force on A}-F_{B on A}= m_{a}a_{a}[/tex]

For the system of B:

[tex]F_{A on B}=m_{B}a_{b}[/tex]

## The Attempt at a Solution

I know something is wrong because when I plug in values I get [tex]F_{B on A}=0[/tex]

I think it may be just me but I've had some trouble with Newtons Third law, I can't stand the book we are using: Physics for engineers and scientists by knight, any suggestions?

Last edited: