Question 1:

A B C I: 2 cm I 4 cm I Three point charges lie on a straight line, as shown in the figure above. The charges on 11.13 and C are 4 \"U, 2p-C and 5 list], respectively. Find the resultant force exerted on: a) charge A: II i + IIj N b) charge E: I:Ii + I: j N c] charge 0: II i + IIj N 4Q +Q $ 1 i : 3 cm L _____________ 4. -3Q 4 cm +2Q Four point charges are located at the corners of a rectangle as shown in the gure above. Take Q = 8 110. Find the resultant force on the following. taking into account the units: ar2Q=|i:t+l:w msq=li:l+l:lm A radioctive element's nucleus has a charge of 88 e. It can spontaneously decay into a nucleus with charge 4 e and a nucleus with a chrage 84 e. Just after the decay, the two nucleii are 2.4 x 10 15 m apart. a) What is the magnitude of the electrostatic force between them? b) What is the magnitude of the acceleration of the bigger particle, whose mass is 5.4 x 10 "kg? x 1030 m/$2