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Ch 08: Centripetal Forces & GravitationWorksheetSee all chapters

# Newton's Law of Gravity

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Sections
Uniform Circular Motion
Period and Frequency in Uniform Circular Motion
Centripetal Forces
Vertical Centripetal Forces
Flat Curves
Banked Curves
Newton's Law of Gravity
Gravitational Forces in 2D
Acceleration Due to Gravity
Satellite Motion: Intro
Satellite Motion: Speed & Period
Geosynchronous Orbits
Overview of Kepler's Laws
Kepler's First Law
Kepler's Third Law

Concept #1: Universal Law of Gravitation

Example #1: Where is Net Force on middle object zero?

Practice: Two spheres of mass 300 kg and 500 kg are placed in a line 20 cm apart. If another sphere of mass 200 kg is placed between them, 8 cm from the 300 kg sphere, what is the net gravitational force on the 200 kg sphere?

Concept #2: Center of Mass Distance

Example #2: Find force between spheres with radii

Practice: A 2,000-kg spacecraft is blasting away from the surface of an unknown planet the same size as the Earth. At 1500km above the surface, an instrument onboard reads the gravitational force to be 18000 N. What is the planetâ€™s mass?