A toy train moves on a straight track that coincides with the positive -axis

PHYSICS · Multi-part · AP · Physics 1: Algebra-based · Kinematics · Kinematics

Problem

A toy train moves on a straight track that coincides with the positive

x

-axis. Starting from the origin at

t = 0

, it travels with a constant velocity of

+4\,\text{m/s}

for

30\,\text{s}

. It then reverses and continues with a constant velocity of

-2\,\text{m/s}

for the next

20\,\text{s}

. Work out the following. (i) Distance covered during the first

30\,\text{s}

. (ii) Distance covered during the next

20\,\text{s}

. (iii) Total distance travelled and net displacement after

50\,\text{s}

. (iv) Average speed and the average velocity (state magnitude and direction) for the entire

50\,\text{s}

interval.