A proton is released from rest at

PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

x = 0

, where the electric potential is

12\,\text{V}

. It moves to

x = 0.020\,\text{m}

, where the potential is

5.0\,\text{V}

. Determine the proton’s speed at

x = 0.020\,\text{m}

. (Proton mass:

1.67 \times 10^{-27}\,\text{kg}

e = 1.60 \times 10^{-19}\,\text{C}

)