Three identical very dense masses of 5600 kg each are placed on the x axis. One mass is at x1= -120 cm , one is at the origin, and one is at x2 = 380 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 What is the direction of the net gravitational force on the mass at the origin due to the other two masses?

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Q: See the attached image.  Thanks.

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Centripetal Force

A particle, body, object or certain mass while travelling in a rotational path or semicircular path, experiences an inertia force. If that inertia force pulls the towards the inward of the imaginary circle in the rotation, it is termed as centripetal force.