|| The earth's radius is 6.37 * 106 m; it rotates once every 24 hours. a. What is the earth's angular speed? b. Viewed from a point above the north pole, is the angular

velocity positive or negative? c. What is the speed of a point on the equator? d. What is the speed of a point on the earth's surface halfway

between the equator and the pole? (Hint: What is the radius

of the circle in which the point moves?)