Question

how can we got v2 _u2 2as​

Answer 1

This is the photo copy of the answer if it is usefulfollow me

Answer 2

I am going to prove it mathematically:

♡Consider a body moving with initial velocity 'u'. It takes time t to cover certain distances and hence its velocity changes into v . It accelerates which is denoted by a.

☆We know that

V = u + at (by the first eq.of motion)

So,squaring the first equation of motion both the sides to get-

v^2 = (u + at )^2

V^2 = u ^2 + 2u × at + (at)^2

V ^2 = u^2 + 2uat + a^2t^2

V ^2 = u^2 + 2uat + 2a^2 t^2/2

( By doing so there is no change in its value and hence we can use second equation of motion ' s = ut +1/2 at^2)

So,we have

V^2 = u^2 + 2a (ut + 1/2 at^2)

V^2 = u^2 + 2as (putting the value of second eq.of motion)

Hence,proved.

By graphically method is shown in the pic above☆☆☆