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January 26, 2015

January 26, 2015

Posted by **Amanda** on Saturday, November 9, 2013 at 12:16am.

1. The centers of two 11.80 kg spheres are separated by 0.09 m. What is their gravitational attraction?

2. What is the ratio of this attraction to the weight of one of the spheres (at the surface of the Earth)?

Please answer both, I'd be greatful.

Thank you

- physics -
**Elena**, Saturday, November 9, 2013 at 5:22pmthe gravitational constant

G =6.67•10⁻¹¹ N•m²/kg²,

F =G•m₁•m₂/R²= G•m² /R²

F/W=F/mg = G•m² /R²mg = G•m /R²g.

mg= G•m•M/R²=>

g= G•M/R² .

F/W= G•m•R² /R²•G•M=m/M

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