Question

A car starts frim rest and attains a velocity of 18km/h in 2sec.find the acceleration in si units

Answer 1

18km/h=5m/s ; hence acceleration (a)
=v/t= 5/2= 2.5m/s^2

Answer 2

18 km/h= 5 m/s

u=0, v= 5 m/s, t= 2 s

a=(v-u)/t = (5-0)/2 m/$s^{2}$

a= 2.5 m/$s^{2}$