Example, cont.
r = 93 million miles = 1.49 x 1011 m;
T = 365 days = 3.15 x 107 sec.
Since we have four equations (above) and four unknowns (vq, w, ar and f), we should be able to solve for the unknowns.
Note that we drop the minus sign for ar since it merely indicates that the acceleration is towards the center.