PHYS 101 Study Guide - Midterm Guide: Bisection, Kqql, Gaussian Surface
Document Summary
If there are 3 charges (all +1. 602 x 10-19 c) on the vertices of an isosceles triangle, where the angles are. 30o, the base is 2a long, and the. Coulomb constant is k, what is the total. Coulomb force on charge 1 in the y- direction from the combined coulomb forces from both charges 2 and 3? net = sin30o (f1-2 + f1-3)=(1/2)(2f1-2) = f1-2 = (k/a2)1. 92 x 10-38 c2 a. ) 0. 96 (k/a2) 10-38 c2 c. ) 3. 33 (k/a2) 10-38 c2 d. ) 1. 66 (k/a2) 10-38 c2 e. ) 0 net = sin30o (f1-2 + f1-3) where, e. g. f1-2 is the coulomb force on charge 1. 1 and charge 2. (distance between 1 and 3 is the same by symmetry. ) cos30o = a/distance1-2 so distance1-2=1. 155a. Next, write f1-2 = kq1q2/(distance1-2)2 = k(1. 602 10-19c)2/(1. 155a)2. Two charges, +q and +3 q, are placed along the x-axis a distance d" apart (see picture).
