Question:
When a car's brakes are fully engaged, it takes 100m to stop on a dry road, which has coefficient of kinetic friction μk=0.8 with the tires. Now suppose only the first 50m of the road is dry, and the rest is covered with ice, with μk=0.2. What total distance does the car need to stop?
(A) 150m.
(B) 200m.
(C) 250m.
(D) 400m.
(E) 850m.