What is the force exerted on the 7.7 kg block by the 10 kg block?

[cmajor]

Homework Statement

Three blocks in contact with each other are pushed across a rough horizontal surface by a 91 N force. F---->[2kg] [7.7kg] [10kg]
If the coefficient of kinetic friction between each of the blocks and the surface is 0.14, find the magnitude of the force exerted on the 7.7 kg block by the 10 kg block.
Answer in units of N.

Homework Equations

F = ma
F = mg
a = F/M - ug

The Attempt at a Solution

from there, I found the acceleration but I am not sure how to find the force exerted on one block by another block.

 

[tiny-tim]

Welcome to PF!

Hi cmajor! Welcome to PF!

… I found the acceleration but I am not sure how to find the force exerted on one block by another block.

Do F = ma on the 10 kg block …

what do you get? ​