The Displacement Function of a Moving Object Is Described By s

Multiple Choice

The displacement function of a moving object is described by $s ( t ) = t ^ { 3 } + 2 t - 1$ . What is the velocity of the object as a function of t?

A) $3 t ^ { 2 }$
B) $3 t ^ { 2 } + 2$
C) 3
D) 2