Question

find the acceleration. t=4s
v=100km/h
u=80km/h

Answer 1

the acceleration is 0.277 m/s2

Answer 2

acceleration =v-u/t
v=100×5/18
v=27.7
u=80×5/18
u=22.2
a=27.7-22.2/4

a=1.37m/s²