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Two particles hv equal mass 5g each & opp. charges 4 X 10 -5 .They r released frm rest with separation of 1 m b\w them.Find speeds of the particle when the seperation is reduce to 50cm

Two particles hv equal mass 5g each & opp. charges 4 X 10-5 .They r released frm rest with separation of 1 m b\w them.Find speeds of the particle when the seperation is reduce to 50cm

Grade:12

1 Answers

Arun
25763 Points
3 years ago
Dear student

 

Applying conservation of momentam bw initial and final stage

Pi = 0

Pf = mv1 +mv2

Pf = Pi

v1 = -v2..........1

Now applying energy conservation bw two points

KEi + (P.E)i = KEf  + (P.E)f

(mv1^2 -mv2^2)/2 =kq^2(2/r -1/r )

mv1^2=154/10

v1=53.66m/s=-v2

 

Regards

Arun (askIITians forum expert)

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