Question

A body moving with a velocity of 54 km/h comes to a halt in 10 seconds. What is its
(a) acceleration, and (b) retardation?
[Ans. (a) -1.5 m/s2, (b) 1.5 m/s2]
I KNOW THE ANSWER BUT,I DON'T know how to SOLVE.PLEASE HELP ME​

Answer 1

Answer:

velocity is given.. you have changed it in m/s.

After changing I would come= 54000/3600m/s.

let intial velocity= 0

Time is given= 10 s

motion first eq.

a= v-u/t

54000-0/3600*10

after solving

-1.5m/s^2