Suppose a high way curve is properly banked to eliminate friction for a speed of 70km/h. If your tires were bald and you wanted to avoid sliding on the road, you would have to drive
a) somewhat below 70/h
b)somewhat above 70k/h
c) at 70km/h
d) at a speed that depend on the mass of the vehicle

Question

Suppose a high way curve is properly banked to eliminate friction for a speed of 70km/h. If your tires were bald and you wanted to avoid sliding on the road, you would have to drive 
a) somewhat below 70/h
b)somewhat above 70k/h
c) at 70km/h
d) at a speed that depend on the mass of the vehicle

anonymous · Answer

if you're not depending at all on friction, you have to drive at the speed for which the track was designed. Here's a good over view: http://www.batesville.k12.in.us/physics/phynet/mechanics/circular%20motion/banked_with_friction.htm