A 100-Kg Cannonball Is Dropped from a Tall Bridge into a a River

Multiple Choice

A 10.0-kg cannonball is dropped from a tall bridge into a river. The diameter of the cannonball is 20.0 cm, and the aerodynamic constant for the ball is C = 0.100. Assuming that the acceleration of gravity is 10.0 m/s² and that the density of air is 1.30 kg/m³, the terminal velocity of the cannonball is

A) 110 m/s.
B) 165 m/s.
C) 221 m/s.
D) 275 m/s.