29. (a) Earth makes one rotation per day and 1 dis (24 h) (3600 s/h) = 8.64 ×104s, so the angular speed of Earth is 542rad7.3 10rad/s.8.64 10 sω−π==××(b) We use v= ω r, where ris the radius of its orbit. A point on Earth at a latitude of 40° moves along a circular path of radius r = Rcos 40°, where Ris the radius of Earth (6.4 ×106m). Therefore, its speed is
This is the end of the preview. Sign up
access the rest of the document.