Question

A car decreases its speed from 80km/h to 60km/h in 5 sec. Find the acceleration of
the car. ​

Answer 1

acceleration = difference between the velocities/time

=(80-60)/5=20/5=4 m/s^2

Answer 2

Answer:(-4)km/hr^2

Step-by-step explanation:

acceleration=final velocity-initial velocity/t

=60-80/5

=(-20)/5

=(-4)km/hr^2

its retardation i.e. negative acceleration