WHAT GOES UP MUST COME DOWN
More on this later…….
Everything in the universe has it
Everything is attracted to
You are are attracted to your
homework, your homework is
attracted to your calculator, your
calculator is attracted to your
pencil and your pencil is
attracted to you!
If everything is so attractive, WHY
DON’T YOU DO YOUR
What is it?
The strength of this
on only two things,
MASS of any two
of those objects
WHAT IS THIS ATTRACTIVE RELATIONSHIP?
One is very simple: the
relationship between mass and
The greater the mass, the greater
the force of gravity – pure and
simple! It is a direct
For example, if an object has 5
times more mass than another
object, the first object will exert
GRAVITY AND MASS
Which mass exerts a greater force of gravity and why?
JUST THE OPPOSITE
The relationship between
distance and gravity is a little
As the distance between the
objects increases, the force of
gravity decreases. This is a
type of indirect (or inverse)
The farther apart objects are,
BUT WAIT, THERE’S MORE!
Here is the complicated part: If the
distance between the objects increases
by 3 times, the force of gravity
decreases by 9 times
Can you figure out the mathematical
relationship between 3 and 9?
The same relationship exists between
4 and 16
5 and 25
This is referred to as the inverse square law
The gravitational effect between objects varies inversely to the square of
the distance between them.
As the distance between
two objects get
LARGER, the force of
gravity between them
How does the force of gravity
Does the force of gravity decrease
a. 1/2 b. 1/4