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Joseph jogs from one end A to the other ...

Joseph jogs from one end A to the other end B of a straight 300 m road in 2 minuts 30 seconds and then turns around and jogs 100 m back to point C in another 1 minute. What are Joseph's average speeds and velocities in jogging (a) from A to B and (b) from a to C ?

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Distance = 300 m
Time =2 min 50 s = 170 s
Average speed `=("Total distance")/("Total time")`
`=(300m)/(170s)=1.76" ms"^(-1)`
Average velocity `=("Displacement")/("Total time")`
`=(300m)/(170s)=1.76" ms"^(-1)`
(b) From A to C
Distance `=(300+100)m=400m`
Time `=(170+60)s=230s`
Average speed `=("Total distance")/("Total time")`
`=(400m)/(230s)=1.73" ms"^(-1)`
Average velocity `=("Displacement")/("Total time") `
`=(200m)/(230s)`
`=0.86"ms"^(-1)`
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