A ball has a radius of 7.50 cm and a mass of 355 grams. When falling through the air, it has a drag coefficient of 0.476. Suppose it is dropped from rest from a very high altitude through air of density 1.21 kg/m³.
a) What is the acceleration of the ball when it is falling at a speed of 11.2 m/sec?
b) What terminal velocity will it reach?