1 &acirc;€“ Charge and Coulomb&acirc;€™s Law

# 1 &acirc;€“ Charge and Coulomb&acirc;€™s...

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Physics 8B 1 – Charge and Coulomb’s Law rev 4.0 1 – Charge and Coulomb’s Law 1. Two identical balls A and B are shown separated by a distance d. Both balls have positive charge +Q, i.e. Q A = Q B = +Q. Both balls are free to move. a) Q: Which ball experiences a larger force? Explain. b) Q: Which ball experiences a larger acceleration? Explain. c) Q: Describe the acceleration of A over time (direction, magnitude, etc). d) Q: Describe the velocity of A over time (direction, magnitude, etc). For original arrangement shown, now assume B is held fixed, e) Q: Where can you place a third ball C, Q C = +Q, so that A will remain stationary: to the left of A, between A and B, or to the right of B? Explain. f) P: Calculate the location of ball C for part e). g) repeat e) – f) for ball C with Q C = +Q/2 h) repeat e) – f) for ball C with Q C = -9Q. d A B +Q +Q

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Physics 8B 1 – Charge and Coulomb’s Law rev 4.0 2. Two small plastic balls are separated by 20 cm. Their charge, mass, and radii are also given. If both balls are free to move, a) Q: Which ball experiences a larger force? Explain. b) Q: When the balls collide, which will be moving faster? Explain. c)
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## This note was uploaded on 09/28/2009 for the course PHYSICS 8B taught by Professor Shapiro during the Spring '07 term at University of California, Berkeley.

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1 &acirc;€“ Charge and Coulomb&acirc;€™s...

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