A person starsts from point A and reaches point C which is the midpoint of BD. If the takes four seoconds time, then determine
(a) the average speed
(b) the average velocity

Explanation

(a) The total distane travelled `=4+3=7m`
`:. "average speed"=("total distacne")("total time")=(7m)/(4s)`
`7//4 m s^(-1)`
(b) The total displacement `=sqrt(AB^(2)+BC^(2))`
`=sqrt(4^(2)+3^(2))=5m`
`:.` average velocity `=5//4 m s^(-1)`