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Question
Thefigureshowstwoequal,positivecharges,eachofmagnitude50°C,fixedatpoints(3,0)m and(–3,0)m respectively. A charge–50OC,movingalongnegativey–axishasakineticenergyof4Jattheinstantitcrosses point(0,4)m.Determinethepositionofthischargewherethedirectionofitsmotionreversesforthefirsttime after crossing this point (neglect gravity).
The correct answer is:
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