Lesson 1: Newton’s Law of Universal Gravitation

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Universal Gravitation

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Lesson 1: Newton’s Law of Universal Gravitation Unit 6: Gravitation

Newton’s Law of Universal Gravitation

Example 1 Find the acceleration due to gravity on the moon and on Jupiter. Moon: M = 7.35x1022 kg, R = 1.74x106 m Jupiter: M = 318ME, R = 11.2RE Answers: On the moon, g = 1.6 m/s2. On Jupiter, g = 25 m/s2. 10 min

Example 2 (Try it!) While scouting a location for a new rebel base, Annie (60 kg) finds a planet of radius 3800 km. If she weighs 320 N on the surface, what is the mass of the planet? Answer: 1.2x1024 kg 20 min

Brain Break!

Example 3 (Try it!) Find the force of gravity on a 600 kg satellite at an altitude of 950 km (above Earth’s surface). Then find its acceleration. Answers: F = 4450 N, a = 7.4 m/s2 20 min