Constants Part A A small particle has charge-2.20 ?C and mass 2.50x10-4 kg. It m

Question

Constants Part A A small particle has charge-2.20 ?C and mass 2.50x10-4 kg. It moves from point A, where the electric potential is VA 140 V, to point B, where the electric potential VB 800 V is greater than the potential at point A. The electric force is the only force acting on the particle. The particle has a speed of 3.00 m/s at point A What is its speed at point B? m/s You may want to review (Pages 759 - 765) For related problemsolving tips and strategies, you may want to view a Video Tutor Solution of Electric Submit

Explanation / Answer

From conservation of energy

1/2 m vA2 + q VA = 1/2 m vB2 + q VB

vB = sqrt [vA2 + 2q/m(VA - VB)]

= sqrt [3.002 + [2*-2.2*10-6/2.5*10-4(140 - 800)] ]

speed at point B = 4.54 m/s

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