Three spiders are resting on the vertices of a triangular web. The sides of the

Question

Three spiders are resting on the vertices of a triangular web.  The sides of the triangular web have a length of a = 0.79 m, as depicted in the figure.  Two of the spiders (S1 and S3) have +7.1

Three spiders are resting on the vertices of a triangular web. The sides of the triangular web have a length of a = 0.79 m, as depicted in the figure. Two of the spiders (S1 and S3) have +7.1 mu C charge, while the other (S2) has ? What are the magnitude and direction of the net force on the third spider (S3)? What are the magnitude and direction of the net force on the third spider (S3

Explanation / Answer

F1 =F2= k*q1*q3/a^2 = 0.574 N

net force = sqrt(F1^2+F2^2+2F1F2COS(THETA))

= sqrt(0.574^2+0.574^2+2(0.574*0.574)cos120)

= 0.574 N

directed towards down

counter clock wise wrt to x axis by an angle 270

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