To find static friction in problems where things are not moving, here are some easy ways to do it:

1. Free Body Diagrams (FBDs):

   • These are drawings that show all the forces acting on an object.
   • They help you see the normal force (which is the force pushing up) and the applied force (which is the force pushing down or to the side).

2. Static Friction Formula:

   • The highest static friction force you can have is calculated using this formula: $F_{s, \text{max}} = \mu_s N$
   • Here, $\mu_s$ is a number that tells us how much friction there is, and $N$ is the normal force.

3. Force Equilibrium Equations:

   • You can write equations from the idea that all forces in a direction should add up to zero.
   • This means checking both the horizontal (sideways) and vertical (up and down) forces to make sure everything balances out.

Using these steps will help you calculate static friction accurately in situations where nothing is moving.