Gravity Presentation
Gravity
Definition:
the force that attracts a body toward the
center of the Earth or toward any other
physical body having mass
Type of Force:
-
Contact Force (eg. friction force,
normal force, spring force)
Non-Contact Force (magnetic force,
gravitational force, electrostatic
force)
Importance of Gravity on Earth
Examples:
-
Keeps Earth in orbit around the
sun
-
Holds down our atmosphere and
air we need to breathe
-
Holds us down to the ground
-
Keeps food in plates and drinks in
cups
Factors Affecting the Gravitational Force Between Objects
Two Factors:
-
-
Size: The size of an object affects
how much gravitational pull it has,
the greater the size, the greater
gravity force
Distance: The distance of between
the objects affects the strength of
the pull, the closer the object, the
greater the gravity force
How the Masses of Objects Affect the Gravitational Force
Between Them
-
-
This table provides us two different objects and their
gravitational force at different weights
Our headings are “Mass of Object 1”, “Mass of
Object 2”, and “Gravitational Force”, the objects are
measured in Kilograms and the force in Newtons
The date is written in scientific notation to simplify
the extremely large numbers being shown
If we look at the data we see a trend that as the
table progresses the mass of the objects increase
As the weight of the objects increase, so does their
gravitational force, their relationship is that the
gravitational force is dependent on the mass of the
objects.
Summary
-
Gravity is the force that a planet or body used to draw other objects towards
its center
-
Without gravity we wouldn’t be able to do everyday things or even live
-
Mass of an object and the distance between objects affects the gravitational
force they have
-
The higher the masses of objects, the higher the gravitational force between
them
-
The closer the distance between objects, the higher the gravitational force
between them