Question

A ball with a mass of 16.3 grams and a diameter of 8.3 cm is hung vertically from the end of a string. A strong wind, travelling at a speed of 7.0 m/s blows past, causing the ball to hang at a nonzero angle with the vertical. Determine the angle that the ball will make with the vertical when it is in static equilibrium. Assume a drag coefficient of 0.45 for a spherical object and that the density of the air is 1.21 kg/m3.

Answer 1