Question

a. what is the students speed from the 3rd to 5th minute?b. at what times during the bike ride did the student come to a stop?c. during what time intervals was the students speed increasing?d. what was the students speed from the 17th to 19th minute?e. during what intervals was the students speed constant (not changing)?f. during what time intervals was the students speed decreasing?

Answer 1

Answer: Provided the graph of distance vs time, we have to answer (a) to (f):

(a) Student's speed from 3rd to the 5th minute:

`S=(\Delta D)/(\Delta t)=(2.5-2.25)/(5-3)=(0.25)/(2)=0.125mi/min`

(b) At what time during the bike ride did the student come to stop:

`\begin{gathered} \text{ Between:} \\ 8th\rightarrow11th \end{gathered}`

(c) During what time interval was the student's speed increasing:

`\begin{gathered} \text{ Between:} \\ \\ 11th\rightarrow14th \end{gathered}`

(d) What was the student's speed between 7th to 19th minute:

`S=(\Delta D)/(\Delta t)=(3.8-3.9)/(19-17)=(0.1)/(2)=(0.05mi)/(min)`

(e) During what time interval was the student's speed constant:

`\begin{gathered} \text{ Between the following five time intervals:} \\ 0min-1min \\ 1min-2min \\ 2min-3min \\ 3min-8min \\ 17min-23min \end{gathered}`