Consider a proton in a uniform electric field directed left to right, as shown in the figure. For both paths the initial speed of the proton is the same, but the direction of the initial velocity is different. Part (A) Compare the change in electric potential energy along path A to the change in electric potential energy along path B. ΔUA = ΔUB ΔUA > ΔUB

Consider a proton in a uniform electric field directed left to right, as shown in the figure. For both paths the initial speed of the proton is the same, but the direction of the initial velocity is different. Part (A) Compare the change in electric potential energy along path A to the change in electric potential energy along path B. ΔUA = ΔUB ΔUA > ΔUB

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Question

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Part (A) Compare the change in electric potential energy along path A to the change in electric potential energy along path B.

ΔU_A = ΔU_B

ΔU_A > ΔU_B

There is not enough information given - we need either the initial speed or the size of the electric field.

ΔU_A < ΔU_B

Part (B) Compare the speed of the proton at the end of path A with the speed at the end of path B.

v_A = v_B

v_A < v_B

It is impossible to tell - you need more information.

v_A > v_B

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