Posted by **Sasha** on Monday, October 26, 2009 at 10:03pm.

calculate the force of Earth's gravity on a spacecraft 12,800 km (2 Earth radii) above Earth's surface if its mass is 1350 kg.

i know the universal gravitation formula is Fg = G [(m1 m2)/ r^2] but im not getting anywhere near the multiply choice answers of: 14,470, 4410 N, 2205 N, or 1470 N

- physics -
**MathMate**, Monday, October 26, 2009 at 10:16pm
r is the distance to the centre of the body. What did you use for r?

- physics -
**Sasha**, Monday, October 26, 2009 at 10:26pm
i tried squaring earth's radii and i tried multiplying it by 2

- physics -
**MathMate**, Monday, October 26, 2009 at 10:46pm
Ouch!

"(2 Earth radii) above Earth's surface" means 3 earth radii from the centre, right?

- physics -
**ajcjk**, Monday, November 9, 2015 at 2:27pm
I have no clue

## Answer this Question

## Related Questions

- Physics - Calculate the force of gravity on a spacecraft 19200 km (3 earth radii...
- college - Calculate the force of Earth's gravity on a spacecraft 12,800 km (2 ...
- Physics - Calculate the force of the Earths gravity on a spacecraft 12,800 km (2...
- phyics-universal gravity - Calculate the force of gravity on a spacecraft 6400 ...
- physics - Calculate the force of Earth’s gravity on a spacecraft 2.00 Earth ...
- physics - Calculate the force of gravity on a spacecraft 19200 km (3 earth radii...
- Physics - Calculate the force of gravity on a spacecraft 19200 km (3 earth radii...
- Physics - Calculate the force of gravity on a spacecraft 19200 km (3 earth radii...
- physics - Calculate the force of gravity on a 10 kg mass if it were 6.4x10^6 m ...
- physics - Calculate the force of gravity on a 12 kg mass if it were 6.4 106 m ...

More Related Questions