# Mutual Gravity I - Warmup!

Two Spherical Objects of Mass, M attracts themselves for their Mutual Gravitation from a Distance, d

One of them is still ( not moving ) , another is orbiting the first one. Which means first one is at the Focus of the second one's orbit.

So, what's the Orbiting Speed of the second object?

Data:

1. $\text{M}=1\times 10^{12}kg$
2. $d=66.73m$
3. $\text{G}=6.673\times 10^{-11} \text{N}m^2kg^{-2}$
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