While moving a 13 kg refrigerator, an upward force of 28 n is applied 52 degrees above the horizontal, so that it accelerates from rest at 1.2 m/s2. what is the frictional force between the refrigerator and the floor?

the frictional force is 1,63 N

Explanation:

We use the second law of movement proposed by Newton and with the help of a free body diagram, we can get the equations for the solution.

In the image attached, we can see a completely analysis of the refrigerator under the different forces and the equations. We must understand the relationship between the normal force and the kinetic friction coefficient.