Question

A car is moving in a straight line with speed 18km/hr.It is stopped in 5s by applying brakes. Find:
i) the speed of the car
ii) the retardation
iii) the speed of the car after 2s of applying the brakes​

Answer 1

Answer:

I) v=18×5/18=5 m/s

ii)a=v/t

=5/5

=1 m/s²

iii)v=at

=(1)(2)

= 2 m/s