4) A circle with a radius of 2.5 meters. On the perimeter of the circle, there...
4) A circle with a radius of 2.5 meters. On the perimeter of the circle, there are 30 charges of +12 micro-coulombs and 11 charges of -3 micro-coulombs. If a positive point charge of +7 micro-coulombs with a mass of 11 kg is shot from very, very far away into the middle of the circle, how fast would it need to be going, in m/s, such that the this charge stops in the middle of the circle? Ignore the weight force.
Homework Answers
Concept: here we find the potential at the center of the circle due to all charges at perimeter . Potential at far away point is zero. Thus we find the potential energy difference and from that using conservation of energy, we find the initial speed where final speed is zero as the object finally stops.
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