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A proton is released from rest in a uniform
electric field of magnitude 50000 V/m di-
rected along the positive x axis and under-
goes a displacement of 0.3 m in the direction
of the electric field as shown.
50000 V/m
0.3 m
B
Find the amount of the kinetic energy
gained after it has moved 0.3 m.
Answer in units of J.
++++++++++++-

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