Chapter 13 Gravitation In this chapter we will explore the following topics: -Newton’s law of gravitation that describes the attractive.

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Chapter 13 Gravitation PhysicsI 2048.
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Presentation transcript:

Chapter 13 Gravitation In this chapter we will explore the following topics: -Newton’s law of gravitation that describes the attractive force between two point masses and its application to extended objects -The acceleration of gravity on the surface of the earth, above it, as well as below it. -Gravitational potential energy -Kepler’s three laws on planetary motion -Satellites (orbits, energy , escape velocity) (13-1)

m1 m2 (13-2)

m1 m2 F12 F21 r m1 m2 r F1 m2 m1 (13-3)

m1 dm r (13-4)

(13-5)

y-axis (13-6)

m2 m1 m1 m2 r F1 (13-7)

r m (13-8)

(13-9)

m B v = 0 v A (13-10)

(13-11) Rotation Axis of the Celestial sphere Polaris Star earth

(13-12)

(13-13)

(13-14)

(13-15)

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