Transcript Gravity and Free Fall

Gravity and Free Fall
By: Andrew Wesson
Free Fall
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Free fall describes any motion of a body
where gravity is the only or dominant
force acting upon it, at least initially
Examples of Free Fall
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Dropping a penny from the empire state
building.
Free fall was demonstrated on the moon
by astronaut David Scott, on August 2,
1971. He simultaneously released a
hammer and a feather from the same
height above the moon's surface.
Gravity
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objects with mass, attract one another.
Everything has gravity.
Gravity
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In everyday life, gravitation is most
familiar as the agent that lends weight to
objects with mass and causes them to fall
to the ground when dropped.
It is responsible for keeping the Earth and
the other planets in their orbits around the
Sun.
Terminal Velocity

A free-falling object achieves its terminal
velocity when the downward force of
gravity equals the upward force of drag.