happens if you crumple up the piece of paper into a
ball? When you decrease the surface area of the
paper by making it into a ball then
friction from air does not affect it as much.
So when you drop a ball of paper, the only
force acting on it is the force of gravity,
therefore it will fall as fast a piece of rock.
animation shows you that. But don't take our
word for it. Try it for yourself.
is a movie
clip that shows Astronaut
David Scott doing a similar experiment
on the Moon where there is no atmosphere
so that the fall of a feather and a hammer will only
be affected by gravity of the moon.
is an animation
that shows you how the gravity of Earth keeps the
moon in orbit around
may have noticed from reading "Why Can't I Jump Very High?" that any thing
with mass has gravity.
This includes you and your friend. This means that if you two were standing next to each other, you and your friend would be
pulled towards each other with a certain amount of force.
But because your masses are so small compared with something
like Earth, the force of gravity between you two is too small to be noticed.
to Orbits: The Gravity Story - A website created by
students about gravity, it's history, and games that will
sure suck you in.
Galileo was the first person to show that different things fell at the same rate on Earth,
but he could not explain why, or if this was true all over the universe.
Song - A short cute song about gravity.
Question - How far do you have to go to escape Earth's gravity?
Homeruns On The Moon - Find out how certain sports will change if you were playing them on the moon, which
has less gravity than Earth.
Always A Bad Hair Day - Shows and explains the presence
of the small gravitational force of Earth on astronauts
Weight On Other Planets - Find out how the gravity
of other planets affect your weight on them.
Soda Play - Create
your own virtual toy with masses and springs, and see
how they behave under different values for gravity. (Advanced)