Solve each problem. See Examples 1–3.
Angular and Linear Speeds of Earth Earth revolves on its axis once every 24 hr. Assuming that Earth’s radius is 6400 km, find the following.
(a) angular speed of Earth in radians per day and radians per hour
(b) linear speed at the North Pole or South Pole
(c) linear speed at Quito, Ecuador, a city on the equator
(d) linear speed at Salem, Oregon (halfway from the equator to the North Pole)
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