Question

A speed of a bus increase from 25km/h to 70km/h is 5 second .find the mean of the bus

Answer 1

Formula of acceleration is a=v-u/t  

So Uis 27km/h we have to change in m/s 27×5/18=15/2=7.5m/s

70km/h is 70×5/18=19.4

T= 5 sec  

7.5×19.4/5=29.1m/s