Calculate the net electrostatic force on charge Q3 if the magnitude of the force

Question

Calculate the net electrostatic force on charge Q3 if the magnitude of the force F13 from the first particle on the third equals 1.5N and this force making an angle of 30 degrees with horizontal axis, and magnitude of the force F23 from the second particle equals on the third equals 1N and cord F23 making an angle of 150 degrees 2. Calculate the net electrostatic force on charge Qs if the magnitude of the force Frs from the first particle on the third equals 1.5 N and this force making an angle force F2s from the second particle equals on the third equals1N and force F23 making an angle of horizontal. nitude of the force F13 from the first particle of 30° with horizontal axis, and magnitude of the 150° wi

Explanation / Answer

F13 = 1.5 N ( cos30i + sin30 j)

= 1.299i + 0.750 j N

F23 = 1N (cos150 i + sin150 j)

= -0.866 i + 0.5j

F = F13 + F23

= 0.433i + 1.25j

magnitude = sqrt(0.433^2 + 1.25^2) = 1.32 N ......Ans

Direction = tan^-1(1.25 / 0.433) = 70.9 deg ..........Ans

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