Physics

Problem

A cart moves along a straight track with an initial velocity of

4.0\,\text{m/s}

to the right. It then experiences a constant acceleration of

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

to the right for

3.0\,\text{s}

, followed immediately by a constant acceleration of

-2.0\,\text{m/s}^2

for

6.0\,\text{s}

. What is the cart’s velocity at the end of the

9.0\,\text{s}

period? a)

31\,\text{m/s}

to the right b)

-7\,\text{m/s}

to the left c)

7\,\text{m/s}

to the right d)

3\,\text{m/s}

to the right