Question

Problem 11b

Answer 1

Given information

Given that both the boxes are at rest and the mass of the box on the bottom is ,.

Also the mass of the box on top ,.

Step-by-step explanation

Step 1.

First, we will consider the box on the bottom.

Consider the free body diagram of the box on the bottom.

But,    

Since the box is at rest;

Therefore,  

Substituting the known values, we get;