The Magnitude of the Acceleration of a Particle Moving Along $\mathbf { r } ( t ) = ( t + 2 ) \mathbf { i } + 2 t \mathbf { j } + 3 \mathbf { k }$

Multiple Choice

The magnitude of the acceleration of a particle moving along the curve $\mathbf { r } ( t ) = ( t + 2 ) \mathbf { i } + 2 t \mathbf { j } + 3 \mathbf { k }$ is

A) $2 \sqrt { 2 }$
B) $\sqrt { 11 }$
C) $\sqrt { 8 t ^ { 2 } + 1 }$
D) $\sqrt { 5 }$
E) 0