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Problem 11 < 11 of 14 C Review Constants Periodic Table Three identical very dense masses of 3600 kg each are placed on the x axis. One mass is at x1 = -120 cm , one is at the origin, and one is at 22 = 450 cm. Express your answer in newtons to three significant figures. View Available Hint(s) AP x 8 x x x x x x x+10" Fgrav = 5.28 · 10-4 Submit Previous Answers X Incorrect; Try Again; 4 attempts remaining Although the two masses not at the origin are identical, they are not the same distance from the origin, so there will be a nonzero net force on the mass at the origin.

Answer 1

net force exert on the mass placed at origin

F = force exerted by mass at x = - 120 cm - force exerted by mass at x = 450 cm

F = Gm ( M1/r1^2 - M2 / r2^2)

F = 6.67* 10^-11* 3600* ( 3600 / 1.2^2 - 3600 /4.5^2)

F = 5.576* 10^-4 N

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