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 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 for ball C with Q C = +Q/2 h) repeat for ball C with Q C = -9Q. 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) P: Find the force (mag. and dir.) on each ball. d)

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

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