Question

a car acclerates uniformly from 36km/h to 72km/h in 10 second calculate acceleration

Answer 1

to convert km/hr to m/s we *5/18

u=36*5/18=10m/s
v=72*5/18=20m/s

a=v-u/t=20-10/10=10/10=1m/s²
hope it helps you

Answer 2

a = v2-v1/t
a= 72-36/10
a= 36/10
a= 18/5
a= 3.6ms-1