A horizontal disk of radius a centered at the origin in the xy-plane is rotating about a
Chapter 0, Problem 91(choose chapter or problem)
A horizontal disk of radius a centered at the origin in the xy-plane is rotating about a vertical axis through the center. The angle between the positive x-axis and a radial line painted on the disk is radians. (a) What does d/dt represent? (b) What is the relationship between d/dt and the speed v of a point on the rim?
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