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If the moon were twice as massive but twice as far from Earth, high tides on Earth would be...?
A. Higher
B. Lower
C. No different
-
I think A but I'm not sure.
Thanks.
4 Answers
- 1 year agoFavorite Answer
It’s B. The equation for gravitational force between two bodies is F = G(m1)(m2)/ r^2... if you double the mass of m2, but double r as well, the distance squared will be a larger number than doubling m2.
- StarryskyLv 71 year ago
BBBBBBBBBBB
While the increased mass helps, it is distance that kills the tidal influence. Gravity attraction decreases as the square of the distance factor. So while twice the mass (2/1) multiplied by the gravity cut (1/2^2 or 1/4) comes to 2/4 or half the tidal influence. Lower.
Source(s): Amateur astronomy for 67 years, building telescopes for 6 decades, a decade working in major city planetariums, college instructor, manufacturing engineer.
