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using third equation
a = v^2 - u^2 / 2x
the final velocity at X/2 is
2* (v^2 - u^2 )/ 2x * X/2 = v1^2 - u ^2
(v^2 - u ^2 )/ 2 = v1^2 - u ^2
(v^2 - u^2 )/2 + u ^2 = v1^2
( v^2+ u ^2 ) /2 = v1^2
V1 = √ v^2 + u ^2 /2
a = v^2 - u^2 / 2x
the final velocity at X/2 is
2* (v^2 - u^2 )/ 2x * X/2 = v1^2 - u ^2
(v^2 - u ^2 )/ 2 = v1^2 - u ^2
(v^2 - u^2 )/2 + u ^2 = v1^2
( v^2+ u ^2 ) /2 = v1^2
V1 = √ v^2 + u ^2 /2
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