Question

how much time it take to accelerate from 72 km per hour to 108 km per hour at 2 metre per second square​

Answer 1

initial velocity,u= 72 kmph = 20m/s

final velocity,u= 108 kmph= 30m/s

Acceleration,a= 2 m/s^2

By first equation of motion

v=u+at

t=v-u/a

t= 30-20/2

t=10/2

t=5s