Question

a 50 m ladder leans against a wall. What is the minimum force of friction needed to prevent the laader from sliding?Assume that the force in the wall is negligible.

Answer 1

Step 1: draw a diagram.

Step 2: identify the forces on the diagram

Step 3: figure out around which point you want to calculate the torque. This is what you'll need to use to figure out the size of the frictional force.

Answer 2

honestly I dont know how to figure out the force thats acting on an inlined, the height of the wall is 8 m.