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Q & A: Mass and gravity

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Most recent answer: 04/23/2009
Q:
Does mass affect gravity?
- Sanah Jivani (age 11)
Spring, Texas, USA
A:
Hi Sanah,
You bet!  Mass affects gravity.  For example if you weigh 100 pounds on earth, you would only weigh about 16 pounds on the moon.  The reason is that the earth has much more mass than the moon and, according to Newton, your weight is proportional to your mass times the mass of the attracting body.  There is an additional factor of the radius of the moon compared to that of the earth and has to be taken into account.  Take a look at
  for some more information.

LeeH

(published on 04/23/2009)

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