1· 0/3 points ! Previous Answers OSCoPhys2016 18.2.WA011 1. 013 points | Previou

Question

1· 0/3 points ! Previous Answers OSCoPhys2016 18.2.WA011 1. 013 points | Previous Answers OSColPhys2016 My Notes Ask Your Teacher Electrodisc, the sport of the future, has players skating across the field on hover shoes pushing around metallic discs. When discs collide players get points based on the amount of charge exchanged. The players today are playing the popular three disc variant of Electrodisc where each disc has the following charges: 9A -34, B 2q, and qc O(no net charge). In the first quarter of the game the opposing team is able to touch disc A and B together then separate them. Then the home team scores by touching disc C to disc A and then separates them. Finally, the opposing team scores again by touching disc C to disc B and then separates them. (Give your answers in terms or q.) a) what is the final charge of object c? Enter a number Iculate the total amount of charge in a system? Does the total charge of the system ever change?q (b) Before the objects touch, what is their total charge? (c) After the objects touch, what is their total charge?

Explanation / Answer

disc A and B are touched,

Q = Qa + Qb = - 3q + 2 q = - q

when separated then

Qa = Qb = - q /2

Now C and A are touched,

Q = Qc + Qa = - q / 2

after Qc = Qa = - q/4

now B and C are touched,

Q = -q/2 - q/4 = - 3 q / 4

Qb = Qc = - 3q /8

(A) - 3/8 or - 0.375

(B) - 1

(C) -1

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