Question

A truck travelling at 54km/hr is slow down to 36km/hr in 10 seconds. Find the retardation?

Answer 1

54km/hr into m/s
54×5/18
=15m/s
36km/hr into m/s
36×5/18
=10m/s

retardation=v-u/t
=10-15/10
=-5/10
=-1/2