Let $\mathbf { a } ( t ) = - 32 \mathbf { k }$

Multiple Choice

Let $\mathbf { a } ( t ) = - 32 \mathbf { k }$ be the acceleration of an object with velocity $\mathbf { v } ( t )$ . If $\mathbf { v } ( 0 ) = 0 \mathbf { i } + 0 \mathbf { j } + 0 \mathbf { k }$ then the speed $\| \mathbf { v } ( t ) \|$ is

A) $64 | t |$
B) $18 | t |$
C) $32 | t |$
D) $16 | t |$
E) $12 | t |$