Transcript Universal Law of Gravitation?

Universal Law of Gravitation?
Universal Law of Gravitation
“Pick a flower on Earth and you
move the farthest star!” 1933
Nobel prize winner, Paul Dirac,
Physicist
He was speaking of the far
reaching effects of gravity
Universal Law of Gravitation
Universal Law of Gravitation
Universal Law of Gravitation
Everything pulls on everything
else in a beautifully simple
way that involves only mass
and distance
Newton did not discover
gravity…what Newton
discovered was that gravity is
universal.
Universal Law of Gravitation
Universal Law of Gravitation
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F = force of gravity
M1= mass of one object
m2= mass of other object
d = distance between the centers
of the masses
G = universal gravitational
constant
Universal Law of Gravitation
The force of gravity between 2 objects is
actually a very weak force.
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Big G is 6.67 x 10-11 N-m2
kg 2
We sense gravity only when very large
masses, like the earth, are involved.
Universal Law of Gravitation
• Using only pencil and paper, Neptune was discovered.
• Uranus was behaving strangely despite all the
calculations of Newton’s law of gravitation. Two
astronomers in 1846 sent letters to observatories to
search a certain part of the sky. The planet Neptune
was discovered in ½ hour.
• Again, Pluto was discovered the same way, because of
the odd behavior of Uranus.
• As the planet Jupiter approaches the planet Saturn in
its orbit, it tends to deviate from its otherwise
smooth path; this deviation, or perturbation, is easily
explained when considering the effect of the
gravitational pull between Saturn and Jupiter.
Universal Law of Gravitation
“Pick a flower on Earth and you move
the farthest star!” 1933 Nobel
prize winner, Paul Dirac, Physicist
He was speaking of the far reaching
effects of gravity
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