Solve the Problem $s = \sqrt { 2 + 2 t }$

Multiple Choice

Solve the problem.
-The position of a particle moving along a coordinate line is $s = \sqrt { 2 + 2 t }$ , with $s$ in meters and $t$ in seconds. Find the particle's velocity at $t = 1 \mathrm { sec }$ .

A) $\frac { 1 } { 2 } \mathrm {~m} / \mathrm { sec }$
B) $1 \mathrm {~m} / \mathrm { sec }$
C) $- \frac { 1 } { 2 } \mathrm {~m} / \mathrm { sec }$
D) $\frac { 1 } { 4 } \mathrm {~m} / \mathrm { sec }$