# Tidal force Calculator

## Calculate the gravitational and tidal forces of the moon and the sun, and their respective ratios of those at apogee to those at perigee.

 Moon's mass kg distance km, eccentricity Sun's mass kg distance km, eccentricity Earth's mass kg, radius km
 Gravity is inversely proportional to the square of the distance, and tidal power is the cube of the distance.The tidal force of the moon is about 2.2 times larger than that of the sun.The ratio of the tidal force of the apogee and perigee is about 1.4 by the elliptical orbit of the moon.$\normal Gravitational\ force\hspace{30}F={\large\frac{GMm}{r^2}}\\[10]Tide\ force\hspace{30}T=-{\large\frac{dF}{dr}}R={\large\frac{2GMm}{r^3}}R\\[10]\hspace{110}R:\ radius\ of\ the\ Earth$
Tidal force
 [1-8] /8 Disp-Num5103050100200
[1]  2017/11/08 10:30   Female / Under 20 years old / High-school/ University/ Grad student / A little /
Purpose of use
need units of tidal force calculations
[2]  2017/05/22 08:01   Male / - / High-school/ University/ Grad student / Very /
Purpose of use
Used to calculate a tidal force, added equations to a physics presentation
[3]  2017/02/25 23:27   Male / 40 years old level / An engineer / Very /
Purpose of use
Calculate tidal force effects on water bodies on Earth going back in time (when the moon was closer to Earth).
Comment/Request
Excellent calculator.
[4]  2016/08/27 00:33   Male / 50 years old level / Others / Very /
Purpose of use
To corroborate calculations of tidal force on Proxima b.
[5]  2015/08/28 12:20   Male / 30 years old level / Others / Very /
Purpose of use
Calculation of tidal force on fictional star+world+moon system.
[6]  2014/12/01 14:37   Male / 60 years old level or over / An engineer / Very /
Purpose of use
learn basik heat stresses of tides
[7]  2014/11/06 18:46   Female / Under 20 years old / High-school/ University/ Grad student / A little /
Purpose of use
needed the equations for tides and the answers
Comment/Request
would be great to have the working out to demonstrate how you got the answers.
[8]  2014/03/03 13:16   Male / Under 20 years old / High-school/ University/ Grad student / A little /
Purpose of use
Trying to determine if something large, say, Mimas, in LEO would cause much of a tidal effect on Earth.

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