Q1. The critical angle for a special type of glass in air is 41.8. The index of refraction for water is 1.33. What is the critical angle if glass is immersed in water?
Q2. A 1125-kg car and a 2250-kg pickup truck approach a curve on the express way that has a radius of 225 m. (a) At what angle must the highway engineer bank this curve so that vehicles travelling at 97 km/h can safely round it? (b) As the car and truck round the curve at 95 km/h, find out the normal force on each one due to the highway surface.