A CT scan uses a rotating X-ray source mounted on a circular ring to capture three dimensional images of a body (see Figure
43.2 on page 521 of the textbook). One rotation of the X-ray source produces one sliced image of the body.
A specific CT scan machine has a circular ring with radius 44 cm (diameter 88 cm), and the mass of the X-ray source mounted
on the circular ring is 26 kg. The ring rotates at a constant rate of 21 rad/s. Answer the following questions.

(a) What is the tangential speed of the X-ray source in m/s?

(b) How many degrees does the X-ray source turn in 100 milliseconds?

(c) What is the magnitude of the centripetal force on the X-ray source?

(d) How many seconds does it take to take one image?

(e) What is the frequency of the rotation of the X-ray source in the unit of Hz?