A Proton Is Accelerated from Rest Through a Potential Difference $V _ { 0 }$

Multiple Choice

A proton is accelerated from rest through a potential difference $V _ { 0 }$ and gains a speed $v _ { 0 }$ . If it were accelerated instead through a potential difference of $2 V _ { 0 }$ , what speed would it gain?

A) $2 v _ { 0 }$
B) $8 v _ { 0 }$
C) $v 0 \sqrt { 2 }$
D) $4 v _ { 0 }$