Name________________________________
Newton’s law of Universal Gravitation
Read pg. 240 -242 and answer the following:
1. What is the force that holds planets in orbit?
2. Why do satellites stay in orbit?
3. Write Newton’s law of Universal Gravitation:
4. What is G and what is it equal to:
5. Why does it appear that an apple is falling towards the Earth and not the other way around?
6. Look at sample C and rewrite the Law of Universal gravitation to solve for r (the distance
between the billiard balls)
Practice C, Do problems one and 3 below. Make sure to show all knowns and unknowns first, then
show the equation you are trying to solve for before solving the problem. Please write neatly so I
can help you.
Read the inside story of Black holes on pg 243. Explain how escape velocity and Schwarzschild
radius are related to black holes:
Applying the Law of Gravitation. Read pg 244-247
1. What causes high tides and low tides?
2. How did Cavendish determine the value of G?
3. What is g?
4. What does g equal?
5. Why does weight change with where your location?
6. What is inertial mass?
Do Section Review questions 1,3 and 5: