Question

Please solve
with process​

Answer 1

Given...

$a = \alpha \: m {s}^{ - 2}$

$ret(a) = \beta \: m {s}^{ - 2}$

as body starts from rest..

so u=0

therefore

$\frac{v - u}{t} = \alpha$

$\frac{v}{t} = \alpha$

.........1

then that body retards at beta metre per second sq. and finally comes to rest

so...v=0

$\frac{ - u}{t} = \beta \: \: \: \: u = - \beta t$

so..

average speed of car...

$\frac{s1 + s2}{2}$

$\frac{ \alpha t + \beta t}{2}$

so the average speed of journey would be..

$\frac{t( \alpha - \beta )}{2}$

hope it helps ✌..

mark as brainliest if it helps