Question

Check correctness of formula v^2=u^2+2as

Answer 1

Hi there

Your answer is :-

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v^2 = u^2 + 2as

v^2-u^2 = 2as

( 3rd equation of motion )


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Thank You

Answer 2

The simple way by which you can check correctness of any equation is the dimensional analysis ••••>

Here v and u are the velocities and their dimensions are [LT^−1] and the dimension of acceleration (a) is [LT^-2] & dimension of distance (s) is [L] .

So , the dimension of [v2−u2] =[LT^-1]2= [L^Y^−2]

& dimension of [2as]= [LT^-2][L]= [L2T−2]

So the dimension of L.H.S and R.H.S are same .

Therefore the we can say that the equation is correct .

Hope helps uh:)