Physics

Problem

A walker covers the following positions according to his distance–time graph:

(0\,\text{s},0\,\text{m})

(3\,\text{s},6\,\text{m})

(6\,\text{s},12\,\text{m})

, and

(10\,\text{s},12\,\text{m})

. Between listed points the graph is made of straight-line segments. Answer the questions that follow. a. (i) Calculate the average speed of the walker for the interval

0\,\text{s}

6\,\text{s}

. b. (ii) Determine the average speed for the entire journey from

0\,\text{s}

10\,\text{s}

. c. (iii) Identify the time interval during which the walker is at rest and explain how the graph shows this. d. (iv) If the walker resumes motion at

t=10\,\text{s}

with the same speed as in the first

3\,\text{s}

, where will he be at

t=14\,\text{s}

? Show your working.

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