Gravitational potential energy
Asked by tangocharliee
| 11th Dec, 2009,
10:01: AM
Dear Student
Gravitation at a distance r g= GMe / r2 ----------------------(1)
Where G is Universal gravitational constant,Me earth mass.
PE of a mass m at a distance r from the earth = mgr =m (GMe / r2) r =mGMe / r
Given that mGMe / r =100GMe / 107 =4.8 x 109 joule ==> GMe=4.8X104 m3/s2 ------(2)
Gravitation at a distance 10 9m g= GMe / 1018 [ from eqn(1) ] ----------------(3)
Weight of the rocket at 10 9m = mg= 100GMe / 1018 =100X 4.8 x 104 /1018 =4.8X10-12 N.
weight of the rocket in newton at a distance 10 9m =4.8X10-12 N.
Regards
Topperlearning
Get GMe from equation (3) ==> mg= 100 X
Answered by
| 13th Jan, 2010,
11:15: AM
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