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September 20, 2014

September 20, 2014

Posted by **Bella** on Friday, February 20, 2009 at 5:45pm.

Which of the following equations expresses Newton's law of universal gravitation?

a. Fc=MVt^2/r

b. Fg=M1M2/r

c. g=Gme/r^2

d. Fg=Gmme/r^2

i really need help..thanks:-)

- physics -
**drwls**, Friday, February 20, 2009 at 6:06pmTwo of the equations deal with the force of gravity. If the "g" is answer d. is a subscript, it is the formula for the gravitational force (weight) of an object of mass m at a distance r from the center of the earth.

Equation c. is also a correct equation for the acceleration of gravity (g) for an object located r from the center of the earth.

Both c. and d, are correct, but not really "universal" since they only deal with the gravity field of the earth.

So all of these choices are flawed in one way or another.

- physics -
**Bella**, Friday, February 20, 2009 at 6:12pmwhich do you think would be the best pick for me

- physics -
**TEHE**, Monday, March 2, 2009 at 6:42amdont know did u find out the answer?

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