Question

A car accelerates uniformly from 18km/h to 36km/h in 5 sec . Calculate acceleration in (1)km/h2 and (2)m/se.

Answer 1

intial velocity= 18km/h = 64.8m/s
final velocity = 36km/h=129.6 m/s
time taken = 5s
acceleration = (v-u)/t = 12.96 m/s^2
= 3.6km/h^2