How Much Force Does the 2kg Block Exert on Adjacent Blocks?

[jade76]

Homework Statement

blocks with masses of 1kg,2kg,3kg are lined up touching on a frictionless table. All three are pushed by a 12N force being applied to block 1(1kg).

how much force does the 2kg block exert on
a) the 3kg block?
b) the 1kg block?

2. Homework Equations [/b

F=MA

The Attempt at a Solution

A=F/M = A=12N/1kg= an acceleration of 12. for the 1kg block.

 

[tiny-tim]

Welcome to PF!

Hi jade76! Welcome to PF!

blocks with masses of 1kg,2kg,3kg are lined up touching on a frictionless table. All three are pushed by a 12N force being applied to block 1(1kg).

how much force does the 2kg block exert on
a) the 3kg block?
b) the 1kg block?
…
A=12N/1kg= an acceleration of 12. for the 1kg block.

Nooo … the 1kg block also has force on it from the 2kg block.

Hint: all the blocks have the same acceleration …

so the equation for that acceleration is … ?