Question

A car moving along a straight high way With a speed of 72kmh-1 is brought to a stop within a distance of 100m. what is the retardation of the car and how long does it take for the car to stop?

Answer 1

v=20m/s
s=100m

v=d/t
20=100/t
t=100/20
t=5 seconds

a=v/t
=20/5
=4m/s square