Physics Problem: Coefficient of Friction to Prevent a Leaning Ladder from Slipping

A 5 m long ladder leans against a wall of ice (with no friction with the wall). The ladder leans at an angle of 42 degrees above the horizontal and has a mass of 12 kg. What is the minimum coefficient of friction between the ladder and the floor so that the ladder does not slip?
I'm working through chapter summaries for introductory physics (algebra-based). I'm using the Openstax online (free) textbook College Physics. You can access this book here openstax.org/d...
Here is the playlist with all the videos and problems for this course.
• Online Physics 1 2024