Calculate the force of gravity on the 1.2kg mass if it were 6.4•10^6m above earths surface...

Question

Question

Calculate the force of gravity on the 1.2kg mass if it were 6.4•10^6m above earths surface (that is, if it were two earth radii from earths center).

Answer 1

Answer #1

The force that gravity exerts on mass m on Earth is:

W = mg = 1.2 x 9.81 = 11.77 N

The distance has increased by a factor of 2, so the force will decrease by a factor of 4 as it follows inverse square law.

F' = 11.77/4 = 2.943 N

Hence, F' = 2.943 N

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Answer 2

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