A 2000-kg automobile starts from rest at point A on a 6o incline and coasts through a distance of 150 m to point B. The brakes are then applied, causing the automobile to come to a stop at point C, 20 m from B. Knowing that slipping is impending during the braking period and neglecting air resistance and rolling resistance, determine (a) the speed of the automobile at point B, (b) the coefficient of static friction between the tires and the road.

A 2000-kg automobile starts from rest at point A on a 6o

incline and coasts through a distance of 150 m to point B. The

brakes are then applied, causing the automobile to come to a

stop at point C, 20 m from B. Knowing that slipping is

impending during the braking period and neglecting air

resistance and rolling resistance, determine (a) the speed of the

automobile at point B, (b) the coefficient of static friction

between the tires and the road.