An object moves along a straight line as follows:

PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

An object moves along a straight line as follows: (i) constant positive velocity for

3\,\text{s}

, (ii) uniformly comes to rest in the next

2\,\text{s}

, (iii) remains at rest for

1\,\text{s}

, (iv) then moves backward, attaining a velocity of

-4\,\text{m s}^{-1}

uniformly in

2\,\text{s}

. Draw the velocity–time graph for the

8\,\text{s}

motion and clearly label the intervals of positive, zero and negative acceleration.