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# Universal Gravitation

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### Transcript of "Universal Gravitation"

1. 1. Universal GravitationUniversal Gravitation  EverythingEverything that hasthat has mass, hasmass, has gravitygravity
2. 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. 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
4. 4. Universal GravitationUniversal Gravitation
5. 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. 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. 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. 8. Universal GravitationUniversal Gravitation  GravityGravity affects everyaffects every object equallyobject equally regardless ofregardless of mass in amass in a vacuumvacuum
9. 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. 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
11. 11. 485 lbs 240 lbs 129 lbs 150 lbs
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