On a winter day with the temperature hovering near freezing, the coefficent of static friction between the tires and an icy road is 0.27. What is the maximum incline that a four-wheel drive vehicle can climb with zero acceleration?

Answer 1

normal force = m g cos A
max friction force up slope = 0.27 m g cos A
weight component down slope = m g sin A
so
m g sin A = 0.27 m g cos A
or
tan A = 0.27