The lift coefficient on a rotating sphere is very approximately given by Here R is the sphere radius and  is rotation rate of the sphere. For the baseball in Problem 12.17, determine the rotation rate...

The lift coefficient on a rotating sphere is very approximately given by

Here R is the sphere radius and
 is rotation rate of the sphere. For the baseball in Problem 12.17, determine the rotation rate for a baseball thrown at 110 mph to have the lift equal the weight. How many rotations would such a ball make in 60 ft 6 in.?

Problem 12.17

A baseball has a circumference of
 inches and a weight of
 ounces. At 95 mph determine

a. the Reynolds number.

b. the drag force.

c. the type of flow (see the illustration for Problem ).