Question

2 charges r placed at a distance. 1 of the charge is fixed. Is conservation of linear momentum applicable

Answer 1

no it is not applicable as 1 charge is fixed so there is an external force acting upon it to fix it.when an external force is applied to a system it doesnt an isolated system on which linear momentum can applied

Answer 2

if u mean 'fix' as rest state. then velocity of 2nd charge is zero.and linear momentum can be applied as it is an isolated system

Answer 3

see the attachment ,two charges ...equal masses.....velocity of Q1=V1.....velocity of Q2 is zero[as it is at rest].this is an example of elastic collision in one dimension

Answer 4

in attachment file. if the collision happens, is that true that the balls move like that?

Answer 5

yes

Answer 6

why? they should collide and then they stay in zero angle related to each other.

Answer 7

i think they make 90 angle

Answer 8

I don't think so. imagine the vectors of velocity.
it does not matter in your answer to this question.
good luck.