A small sphere with charge qq = -5.00 μCμC is moving in a uniform electric field that has no yy- or zz-component. The only force on the sphere is the force exerted by the electric field. Point AA is on the xx-axis at xx = -0.400 mm, and point BB is at the origin. At point AA the sphere has kinetic energy KA=8.00×10−4JKA=8.00×10−4J, and at point BB its kinetic energy is KB=3.00×10−4JKB=3.00×10−4J.
Part A
What is the potential difference VAB=VA−VBVAB=VA−VB?
Express your answer with the appropriate units.
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VA−VBVA−VB =
nothingnothing
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Part B
Which point, AA or BB, is at higher potential?
AABBEqual