ch13-p045 - 45 Let N be the number of stars in the galaxy M...

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45. Let N be the number of stars in the galaxy, M be the mass of the Sun, and r be the radius of the galaxy. The total mass in the galaxy is N M and the magnitude of the gravitational force acting on the Sun is F = GNM 2 / r 2 . The force points toward the galactic center. The magnitude of the Sun’s acceleration is a = v 2 / R , where v is its speed. If T is the period of the Sun’s motion around the galactic center then
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This note was uploaded on 05/17/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.

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