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

2. Newton’s Law of Universal Gravitation

3. 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

4. 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

5. Brain Break!

6. 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