Question

I need help on this science homework I forgot on what to do through number 4-7 including a,b,c,d, and e.

Answer 1

`\begin{gathered} (a)\Rightarrow v=2ms^(-1) \\ (b)\Rightarrow v=1ms^(-1) \\ (c)\Rightarrow v=6.67ms^(-1)_{} \\ (d)\Rightarrow v=1.2ms^(-1) \\ (e)\Rightarrow v=0ms^(-1) \end{gathered}`

Step-by-step explanation: We need to calculate the speed on intervals a b c d and e, the speed can be calculated with the following formula:

`v=(\Delta S)/(\Delta t)\Rightarrow(1)`

(a) 0-5 seconds Interval:

`\begin{gathered} v=(\Delta S)/(\Delta t)\Rightarrow v=((10m-0m))/((5s-0s))=(10m)/(5s)=2ms^(-1) \\ v=2ms^(-1) \end{gathered}`

(b) 5-15 seconds Interval:

`\begin{gathered} v=(\Delta S)/(\Delta t)\Rightarrow v=((20m-10m))/((15s-5s))=(10m)/(10s)=1ms^(-1) \\ v=1ms^(-1) \end{gathered}`

(c) 15-18 seconds Interval:

`\begin{gathered} v=(\Delta S)/(\Delta t)\Rightarrow v=((40m-20m))/((18s-15s))=(20m)/(3s)=6.67ms^(-1) \\ v=6.67ms^(-1) \end{gathered}`

(d) 18-23 seconds Interval:

`\begin{gathered} v=(\Delta S)/(\Delta t)\Rightarrow v=((46m-40m))/((23s-18s))=(6m)/(5s)=1.2ms^(-1) \\ v=1.2ms^(-1) \end{gathered}`

(e) 23-25 seconds Intervals:

`\begin{gathered} v=(\Delta S)/(\Delta t)\Rightarrow v=((40m-40m))/((25s-23s))=(0m)/(2s)=0ms^(-1) \\ v=0ms^(-1) \end{gathered}`