Question

The original ferris wheel, built by George Ferris for the Columbian Exposition of 1893, was much larger and slower than its modern counterparts: It has a diameter of 250 feet and contained 36 cars, each of which held 40 people; it made one revolution every 10 minutes. Suppose that the figure had coordinates (125,0) at time t=0. Find the rule of a function that gives the y- coordinate of car D at time t.

Answer 1

You need to tell me where D was at the start to get phi in
y = 125 + 125 sin (.2 pi t - phi)

Answer 2

125sin(pi(t)/5)