Question

a car accelerates uniformly from 20km/h to 35km/h in 5 seconds. calculate the acceleration

Answer 1

I have some doubts. I know I have to convert time , so I converted km/h into m/s. Thus, I got Initial velocity=50/9Final velocity=175/18 I applied the formula and got 5/6 as acceleration  , and ,1375/36 as distance. 

Answer 2

Given

Initial velocity (u) =20km/h

Final velocity (v) =35km/h

Time=5sec

Changing time into m/s

1km/hr =1000/3600=5/18 m/s

Then

U=20x5/18

U=100/18

V=35x5/18

V=175/18

Acceleration = v-u/T

V-u=175/18-100/18

V-u=75/18

Acceleration = (75/18)/5

Acceleration =15/18

A=0.8333m/s²

This is ur ans hope it will help you in case of any doubt comment below