일반물리학 1 — Rotation: Problem 25

25 (a) What is the angular speed \(\omega\) about the polar axis of a point on Earth’s surface at latitude \(40^{\circ} \text{N}\)? (Earth rotates about that axis.) (b) What is the linear speed \(v\) of the point? What are (c) \(v\) and (d) \(v\) for a point at the equator?