show that v2-u2=2as plz plz
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unknown090:
i m class 8
Answered by
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Answer:
here it is....
Explanation:
we know that
v=u + a*t (first eq.)
squaring both sides...
v2 = (u+a*t)2
v2= u2+ a2*t2 + 2at*u.......(1)
and we know that s=ut+1/2at2
so putting this equation in the value of u in eq1
we get,
v2=u2+a2t2+2at*(s/t - 2at)
2at will be cancelled from 2at
and hence
v2=u2+2as
v2-u2=2as
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