Question

how to find magnitude of applied force​

Answer 1

Answer:

Using the x and y coordinates for the components, this gives F = √(x2 + y2) for the magnitude of the force. Find the resultant force from two vectors by first adding the x-components and y-components to find the resultant vector and then use the same formula for its magnitude.

Answer 2

$\huge\mathfrak\red{Answer}$

The magnitude of the frictional force is the applied force. If the block was accelerating, then you would say Applied Force - Frictional Force = ma and then solve for the magnitude which would be Applied Force= ma+frictional Force.