Quizzes 4,5 Answers

1. How do we describe motion?
2. How is mass different from weight?
3. How did Newton change our view of the universe?
4. What are Newton's three laws of motion?
5. When was Isaac Newton born?
6. When did Galileo Galileo die?
7. Is the First Law of Motion still valid?
8. What is speed?
9. What is velocity?
10. What is acceleration?

1. What keeps a planet rotating and orbiting the Sun?
2. Where do objects get their energy?
3. What determines the strength of gravity?
4. How does Newton's law of gravity extend Kepler's laws? 
5. How do gravity and energy allow us to understand orbits?
6. How does gravity cause tides?
7. Write down Newton's formula for the force of gravity.
8. What is Earth's escape velocity?
9. What is Sun's escape velocity?
10. What is Jupiter's escape velocity?

You can use Wikipedia.

Newton's Law of Gravity

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Escape velocities:

Earth 11.186 km/s^[

Sun 617.7 km/s

Jupiter 59.5 km/s