Three identical very dense masses of 4800 kgeach are placed on
the x axis. One mass is at x1 = -120 cm , one is
at the origin, and one is at x2 = 410 cm .

Part A

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.

Part B

What is the direction of the net gravitational force on the mass
at the origin due to the other two masses?