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Unformatted text preview: Here is how the formula is used: Force G = G x Mass of Object A x Mass of Object B Distance x Distance DISTANCE = Earth’s Radius Object B (Earth) Object A (1 kg mass) Force = ( 6.67 x 10 –11 ) x = 9.8 N ( 6.38 x 10 6 ) 2 Universal Gravity Constant, G Earth’s Radius Earth’s Mass Additional Question Find gravity’s acceleration on the 1 kg mass. Using Newton’s Second Law, Acceleration = = = 9.8 m/s 2 , which we’ve been rounding off as 10 m/s 2 . Force Mass 9.8 N 1 kg Weightlessness Earth is nearby In deep space, far away from all planets, stars , etc., there is almost no gravity force. In orbit near Earth, gravity is still strong (only 10% less than on surface). Why are spacecraft astronauts “weightless”? Check: Forces On the Ferris wheel, where do you feel heaviest? where do you feel lightest? This is similar to the elevator problem we did previously… E A B C D Velocity Centripetal Force...
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This note was uploaded on 04/29/2010 for the course PHYS 100 taught by Professor Nidhalguessoum during the Spring '10 term at American University of Sharjah.
 Spring '10
 NidhalGuessoum
 Physics, Force, Gravity

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