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**1. Homework Statement**

What is the force of gravity acting on a 4500kg satellite when it orbits three Earth radii from the Earth's center?

**2. Homework Equations**

Gm1m2/r²

mass of the earth=5.98*10^24kg

radius of the earth=6370km

**3. The Attempt at a Solution**

This is a multiple choice question, with answers:

15000N

45000N

500N

1500N

5000N

However, what I get from plugging in is:

[(6.67*10^-11)(4500)(5.98*10^24)]/(3*6370)²

which equals roughly: 5.0*10^9 which is completely off any of the answers... can anyone help me?

hahaha, never mind! I forgot to convert the km to m... -_-

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