PLEASE HELP GIVNG MEDALS N FANNING
Four charges are placed at the four corners of a square of side 15 cm. The charges on the upper left and right corners are +3 μC and -6 μC respectively. The charges on the lower left and right corners are -2.4 μC and -9 μC respectively. The net electric force on -9 μC charge is:

18 N, 750 below the positive x-axis

18 N, 750 below the negative x- axis

18 N, 750 above the negative x- axis

18 N, 750 above the positive x- axis

Question

PLEASE HELP GIVNG MEDALS N FANNING
Four charges are placed at the four corners of a square of side 15 cm. The charges on the upper left and right corners are +3 μC and -6 μC respectively. The charges on the lower left and right corners are -2.4 μC and -9 μC respectively. The net electric force on -9 μC charge is:


18 N, 750 below the positive x-axis
	
18 N, 750 below the negative x- axis
	
18 N, 750 above the negative x- axis
	
18 N, 750 above the positive x- axis

anonymous · Answer

attachment

anonymous · Answer

@SolomonZelman

danjs · Answer

need to calculate 3 forces using Coulombs Force law, making sure to get the direction right for each, then add up the three vectors to a resultant force

anonymous · Answer

i got B but i think its wrong i just dont get this

danjs · Answer

do you know what coulombs law is

danjs · Answer

sorry , got to go, remember like charges repel

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anonymous · Answer

@welshfella