Question

I have derived an equation myself for physics. You cant use it in paper but verify the ans.

Answer 1

thanks for derivation

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Answer 2

See, you derived s=1/2 (v+u)×t, 1/2 (v+u) means average velocity, thus
s=average velocity × t; which means we get average velocity= s/t.
That is, av. velocity=total displacement/total time