Constants Part A Three identical very dense masses of 5000 kg each are placed on

Question

Constants Part A Three identical very dense masses of 5000 kg each are placed on the x axis. One mass is at 21 = -150 cm, one is at the origin, and one is at 2 450 CImm 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 6.67x10-11 N-m2/kg2. Express your answer in newtons to three significant figures View Available Hint(s) rav Submit Part B What is the direction of the net gravitational force on the mass at the origin due to the other two masses? +x direction direction Submit Request Answer

Explanation / Answer

a) F = G m1 m2 / r2

F12 = (6.67 * 10-11 * 5000 * 5000) / (150 * 10-2)2

= 7.41 * 10-4 N

F23 = (6.67 * 10-11 * 5000 * 5000) / (450 * 10-2)2

= 8.23 * 10-5 N

Fnet = (7.41 * 10-4) - (8.23 * 10-5)

magnitude = 6.58 * 10-4 N

b) direction of net force is towards

-x direction

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