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

PHYSICS · Single correct · CBSE · Physics · Motion · Motion

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