Friday
April 18, 2014

Homework Help: physics

Posted by chitra on Tuesday, December 15, 2009 at 8:04pm.

Hint: for part I use G = 6.67 times 10 to the
negative 11. for part II, you donít need to
do the full calculation, you can just use your
knowledge of how force of gravity depends on
mass and separation distance.
Compare the gravitational force on a 49 kg
mass at the surface of the Earth (with ra-
dius 6.4 ◊ 106 m and mass 6 ◊ 1024 kg) with
that on the surface of the Moon with mass
1
81.3
ME and radius 0.27RE.
What is the force on the Earth?
Answer in units of N.

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