At time an object moving along a straight line has velocity and acceleration

MATHEMATICS · Subjective · AP · Calculus AB · Contextual Applications of Differentiation · Contextual Applications of Differentiation

Problem

At time

t = 4\text{ s}

an object moving along a straight line has velocity

v(4) = -2\,\text{m/s}

and acceleration

a(4) = 3\,\text{m/s}^2

. Determine whether the object is speeding up or slowing down at

t = 4\text{ s}