A Car accelerates uniformaly form rest. If the reading on the speedometer after 5 s is `km h^(-1)`

Explanation

`u=0, v=72 km h^(-1) 72 35 m s^(-1) 20 m s^(-1)`
`:.` acceleration `=(v-u)/(t)=(20-0)/(5)=4 m s^(-1)`