Physics

Problem

An object moving in a straight line experiences an acceleration of

+3\,\text{m/s}^2

for the first

5\,\text{s}

, followed by an acceleration of

-2\,\text{m/s}^2

for the next

4\,\text{s}

. If the object’s initial velocity is

4\,\text{m/s}

, what is its velocity at the end of the

9\,\text{s}

interval? a)

19\,\text{m/s}

13\,\text{m/s}

11\,\text{m/s}

7\,\text{m/s}