1. November 2
AP Physics

2. In:
If the moon has a mass of  × 1022 kg, an orbital speed of km/s an orbital radius of km, What is the gravitational force of the earth moon system?

3. Objective: To find out about the law of universal gravitation.
Success criteria:
You will be able to solve universal gravitational problems.

4. Homework:
#52

5. Newton’s Law of Universal Gravitation

7. Newton’s Law of Universal Gravitation:

9. Problem:
Oscar (mass=65kg) and Olivia (mass=45 kg) sit 2 meters apart in physics class. What is the force of gravitational attraction between them? Does this cause them to drift toward each other?

10. Gravitational force is a vector

11. Anything that spreads out from a point source
Inverse square laws
Anything that spreads out from a point source
Gravitational force
Electrical force
Sound intensity
Light intensity
Radiation intensity

12. Inverse square law - gravitation

13. Inverse square law – light intensity

14. Light intensity

15. Inverse square law - radiation

17. Inverse square law – electric force

18. Sound spreads out as an inverse square

19. Gravitation problem set:

20. Out:
If the distance between two point particles is doubled, then the gravitational force between them:
Decreases by a factor of 4
Decreases by a factor of 2
Increases by a factor of 2
Increases by a factor of 4
Cannot be determined without knowing the masses.