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 $\mathbf { v } ( t )$ is

A) $32 t \mathbf { k }$
B) $- 32 t \mathbf { k }$
C) $- 32 t \mathbf { i }$
D) $- 32 t \mathbf { j }$
E) $32 t \mathrm { j }$