A Proton That Is Initially at Rest Is Accelerated Through $500 \mathrm {~V}$

Multiple Choice

A proton that is initially at rest is accelerated through an electric potential difference of magnitude $500 \mathrm {~V}$ . What speed does the proton gain? $\left( e = 1.60 \times 10 ^ { - 19 } \mathrm { C } , m \right.$ proton $\left. = 1.67 \times 10 ^ { - 27 } \mathrm {~kg} \right)$

A) $1.1 \times 10 ^ { 5 } \mathrm {~m} / \mathrm { s }$
B) $3.1 \times 10 ^ { 5 } \mathrm {~m} / \mathrm { s }$
C) $2.2 \times 10 ^ { 5 } \mathrm {~m} / \mathrm { s }$
D) $9.6 \times 10 ^ { 5 } \mathrm {~m} / \mathrm { s }$