Q. A string requires a 186 N force in order to break. A 1.50 kg mass is tied to this string and whirled in a vertical circle with a radius of 1.90 m. What is the maximum speed that this mass can be whirled without breaking the string?
Q. A curve on a level road has a radius of 120 meters and is banked at the correct angle for a speed of 20 meters per second. If a car rounds this curve at 30 meters per second, what is the minimum coefficient of static friction between the tyres and the rod needed to prevent skidding?