1. Gravity Notes Part 2

2. What are the other effects of gravity?
Projectile motion
When you throw a ball it does not drop straight down
Instead, the ball follows the path below

3. What are the other effects of gravity?
Projectile motion
When you throw a ball it does not drop straight down
Instead, the ball follows the path below

4. What are the other effects of gravity?
Gravity and other forces cause this arc formation
Throwing Force
Gravity

5. What are the other effects of gravity?
Objects in free fall versus objects in projectile motion
Fall at the same speeds
Hit the ground at the same time

6. Which will hit the ground first?
Projectile Motion
Gravity projectile
Monkey and a Gun

7. Weight
Mass = amount of matter in an object
Weight = force of gravity on an object
Weight changes with gravity but mass does not!

8. Imagine Miss Falk on different planets:
Weight on Earth = 110 lbs
Venus = 90% Earth’s gravity 
_______lbs.
Mars = 38% Earth’s gravity 
_______lbs.
Jupiter = 250% Earth’s gravity 
_______lbs. 99 42
275

9. What factors affect gravity?
Gravity is not unique to Earth
Universal gravitation
A force of gravity exists between all objects in the universe
All objects attract one another

10. What factors affect gravity?
Sometimes we feel this attraction and a lot of times we don’t…WHY?
Mass
Objects with greater mass have greater gravitational force

11. What factors affect gravity?
Why are we pulled to the Earth and not the other way around?
Earth has a much greater mass and so a much stronger gravitational pull.

12. What factors affect gravity?
Why do the planets orbit the sun?
The sun’s mass is so great that its gravitational pull is strong enough to keep the planets locked in place.

13. What factors affect gravity?
Distance
As distance increases between 2 objects, the attraction becomes weaker.
As distance decreases between 2 objects, the attraction becomes greater.

14. What factors affect gravity?
Distance
Consider a spaceship traveling from Earth to the moon.

15. Any Questions?