# A standard basketball has a radius of 120 mm and a mass of 560 grams. Its coefficient of drag, CD, is 0.3 (a wild guess), independent of air speed. Such a ball is dropped from an airplane flying horizontally at 12-km altitude over the ocean. What is the velocity of the ball at the moment of impact on the water? Make reasonable assumptions.

A standard basketball has a radius of 120 mm and a mass of 560 grams. Its coefficient of drag, CD, is 0.3 (a wild guess), independent of air speed. Such a ball is dropped from an airplane flying horizontally at 12-km altitude over the ocean. What is the velocity of the ball at the moment of impact on the water? Make reasonable assumptions.. Its coefficient of drag, CD, is 0.3 (a wild guess), independent of air speed. Such a ball is dropped from an airplane flying horizontally at 12-km altitude over the ocean. What is the velocity of the ball at the moment of impact on the water? Make reasonable assumptions.