A car’s velocity–time graph can be described as follows: it slows down uniformly from…

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

Problem

A car’s velocity–time graph can be described as follows: it slows down uniformly from

20\,\text{m/s}

10\,\text{m/s}

in the first

5\,\text{s}

, then continues at

10\,\text{m/s}

for the next

4\,\text{s}

, and finally speeds up uniformly to

16\,\text{m/s}

in the last

3\,\text{s}

. (i) Calculate the acceleration during the first

5\,\text{s}

. (ii) Determine the total displacement during the entire

12\,\text{s}

. (iii) Find the average velocity for the whole journey.