Electric Potential Energy Video Lessons

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Problem: A proton follows the path shown in (Figure 1) . Its initial speed is v0 = 2.9×106 m/s. What is the proton's speed as it passes through point P? Express your answer to two significant figures and include the appropriate units.

FREE Expert Solution

Electrostatic potential energy:

U=kq1q2r

Law of conservation of energy:

Ki+Ui+Wnc=Kf+Uf Wnc is the work done by non-conservative forces like friction.

Ki + Ui + Wnc = Kf + Uf 

(1/2)mv02 + kq1q2/ri + 0 = (1/2)mvf2 + kq1q2/rf 

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Problem Details


A proton follows the path shown in (Figure 1) . Its initial speed is v0 = 2.9×106 m/s. What is the proton's speed as it passes through point P? Express your answer to two significant figures and include the appropriate units.

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