A bus decreases its speed from 80 km to 60 km in 5s. What is the acceleration of the bus?

Question

4725 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-10-30T19:32:51

$"Acceleration of the bus is :"a=-10/9" "m/s$

$"acceleration of an object is described as :"a=(Delta v)/(Delta t)$

$Delta v=60-80=-20(km)/h$

$Delta t=5 s$

Here we are converting the units to $m/s$ :

$-20" "(km)/h=-20.000/3600=-200/36=-50/9m/s$

$a=(Delta v)/(Delta t)$

$a=(-50/9)/5$

$a=-cancel(50)/9*1/cancel(5)$

$a=-10/9" "m/s^2$