1.
Universal GravitationUniversal Gravitation
EverythingEverything
that hasthat has
mass, hasmass, has
gravitygravity
2.
Universal GravitationUniversal Gravitation
When something is very large,When something is very large,
like the Earthlike the Earth
The gravity is easy to detectThe gravity is easy to detect
Harder to detect the gravity ofHarder to detect the gravity of
really small objectsreally small objects
3.
Universal GravitationUniversal Gravitation
The force of gravityThe force of gravity
depends on:depends on:
How massive the objectsHow massive the objects
areare
How far apart the objectsHow far apart the objects
areare
5.
Universal GravitationUniversal Gravitation
When gravity is the onlyWhen gravity is the only
force acting on an object,force acting on an object,
Its in “free fall”Its in “free fall”
6.
Universal GravitationUniversal Gravitation
Free fall near the Earth’sFree fall near the Earth’s
surface is constantsurface is constant
Fall at a rate of 9.8 m/sFall at a rate of 9.8 m/s22
(g)(g)
7.
0 m/s
9.8 m/s
19.6 m/s
29.4 m/s
39.2 m/s
49.0 m/s
8.
Universal GravitationUniversal Gravitation
GravityGravity
affects everyaffects every
object equallyobject equally
regardless ofregardless of
mass in amass in a
vacuumvacuum
9.
Universal GravitationUniversal Gravitation
Weight depends on gravityWeight depends on gravity
Weight and mass areWeight and mass are
proportional to each other,proportional to each other,
But theyBut they are notare not the samethe same
thingthing
10.
Universal GravitationUniversal Gravitation
The moon’s gravity is 1/6The moon’s gravity is 1/6thth
thatthat
of the Earth’sof the Earth’s
8 lb bowling ball would weigh8 lb bowling ball would weigh
about 1.33 lbs on the moonabout 1.33 lbs on the moon
What about its mass?What about its mass?
Stays the sameStays the same
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