1. Universal Gravitation
Another Newtonian Law
The strength of the gravitational force depends on:
mass of the 2 objects
distance between the 2 objects

2. Universal Gravitation
The equation…
FG = force of gravity G = gravitational constant m1 = mass of the 1st object m2 = mass of the 2nd object r = distance between objects

3. increase distance = ?
Denominator gets exponentially larger
decrease gravitational force

4. decrease distance = ?
Denominator gets exponentially smaller
increase gravitational force

5. Increase the mass = ?
Numerator gets larger
increase gravitational force

6. Decrease the mass = ?
Numerator gets smaller
decrease gravitational force

7. Other Examples What happens to FG if one mass is doubled? tripled?
halved?

8. Other Examples
What happens to FG if the distance between the objects is doubled?
tripled?
halved?