Question

During last week's snowstorm a 63 kg student was standing on a concrete ramp, hoping not to slip on the slushy snow. The incline of the ramp was 6 degrees. What is the minimum coefficient of friction needed on this incline for the student to remain stationary, without sliding down?

Answer 1

Resolving up the plane F:mg sin θ Resolving perpendicular to the plane R-mg cos θ In the limiting equilibrium Sin-0.105 cos 6 This is the minimum coefficient of friction