Question

A car accelerates from rest at a constant rate a for some time, after which it decelerates at a constant rate B and comes to rest. If
the total time elapsed is t, then the displacement of the car is​

Answer 1

Answer:let max velocity be v

therefore v=0+at1---------1

also 0=v-bt2---------2

from above we get,

t1=v/a and t2=v/b

t1+t2=t=v/a+v/b

therefore v=(ab/a+b)t