Derive the third equation of motion : v2 - u2 =2as
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v=u+at
squaring both sides v^2=(u+at)^2
v^2=u^2+2uat+a^2t^2
v^2=u^2+2a(ut+1/2at^2)
v^2=u^2+2as
v^2-u^2=2as
squaring both sides v^2=(u+at)^2
v^2=u^2+2uat+a^2t^2
v^2=u^2+2a(ut+1/2at^2)
v^2=u^2+2as
v^2-u^2=2as
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