Three identical very dense masses of 6500 kg each are placed on the x axis. One mass is at x 1 = -140 cm , one is at the origin, and one is at x 2 = 390 cm .
What is the magnitude of the net gravitational force Fgrav on the mass at the origin due to the other two masses?
Take the gravitational constant to be G = 6.67×10?11 N?m2/kg2 .
Express your answer in newtons to three significant figures.
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