Question

A point charge q2 =-1.8 pC is fixed at the origin of a co-ordinate system as shown. Another point charge q 1.7 HC is is initially located at point P, a distance d 6.8 cm from the origin along the x-axis 1) What is ΔPE, the change in potenial energy of charge q1 when it is moved from point P to point R, located a distance d2 2.7 cm from the origin along the x-axis as shown? 615 Submit 2) d2 R The charge q2 is now replaced by two charges q and q which each have a magnitude of-0.9 uC, half of that of q2. The charges are located a distance a = 1.6 cm from the origin along the y-axis as shown. What is ΔPE, the change in potential energy now if charge q, is moved from point P to point R? 48 Submit 3) d2 R 94 What is the potential energy of the system composed of the three charges q1, q, and q, when q, is at point R? Define the potential energy to be zero at infinity Submit

#3 and #4 please help! (worked out problem is greatly appreciated)

Answer 1

0 k. x0.0 34 0- 03)3 0·0313

34 91 8 O 0313 b. 0313 D 032 D.0313 6.os, じっーD.632 . P125 J

35 0 D3L 0、0313 0313 -3 D.031