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Q. The potential at location A is 430 V. A positively charged particle is released there from rest and arrives at location B with a speed vB. The potential at location C is 780 V, and when released from rest from this spot, the particle arrives at B with twice the speed it previously had, or 2vB. Find the potential at B.

Q. A sportscar, Fiasco I, can accelerate uniformly to 120mi/h in 30s. Its maximum braking rate cannot exceed 0.7g. What is the minimum time required to go 1/2mi, assuming it begins and ends at rest?

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