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- Homework Statement
- Calculate the total force on the Earth due to Venus, Jupiter, and Saturn, assuming all four planets are in a line, as shown in the figure. The masses are MV=0.815ME, MJ=318ME, MSat=95.1ME, and the mean distances of the four planets from the Sun are 108, 150, 778, and 1430 million km

- Relevant Equations
- I was not given relevant equations, but I am assuming it is F = Gm1 m2/r^2

I am confused how I am supposed to figure out the answer if I do not know the mass of the earth? Do I just set it to 1 and use m1 and m2 as ratios?