A space station in the form of a large wheel, 321 m in diameter, rotates to provide an "artificial gravity" of 5 m/s^2 for people located on the...

A space station in the form of a large wheel, 321 m in diameter, rotates to provide an "artificial gravity" of 5 m/s^2 for people located on the outer rim. Find the rotational frequency of the wheel that will produce this effect. Answer in units of rpm.