1. Gravity

2. Gravity Force that pulls objects toward each other
More mass = more gravity
Why do you not attract things?

3. Universal Gravitation
Gravity acts everywhere in the universe
Law of Universal Gravitation: Force of gravity acts between all objects in the universe
Any 2 objects attract each other
Other gravitational forces are small compared to that of the earth

4. Factors That Affect Gravity
2 factors affect gravitational attracting between objects
Mass: more mass = more gravity
Distance: More distance = less gravity

5. The Sun Large Mass Keeps planets in orbit
Force that changes the direction of the planet’s movement
Further away, less gravity acts on them

6. Free Fall
When the only force acting on an object is gravity, the object is said to be in free fall
Therefore, in free fall, the force of gravity is an unbalanced force
Acceleration do to earths gravity = 9.8m/s2

7. Air Resistance Upward force on falling objects
More surface area = more air resistance
Air resistance increases with velocity
Terminal velocity: greatest velocity a falling object reaches
Reached when force of air resistance equals the weight of the object