Parabolic Motion, equation for t

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The equation t = (v - u)/a is used to calculate time in parabolic motion, where v is the final velocity, u is the initial velocity, and a is acceleration. The discussion highlights confusion regarding the correct application of this formula when the final velocity along the y-axis is zero. Participants suggest checking for potential errors, such as forgetting to account for negative values or considering whether acceleration is constant. Clarification on the definition of "parabolic motion" is also requested to ensure proper understanding of the context. Accurate calculations require careful attention to these factors to derive the correct value for time.
RobSchneider
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I'd like to know why

t= v - u/a

will not get me a correct value for t when v= final velocity, u= initial velocity and a=acceleration, when the final velocity of the projectile along the y axis=0.
 
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I hope you mean t= (v - u)/a.
Please show your working so that we can see where you go wrong. Are you perhaps forgetting to make a negative?
 
What do you mean with "parabolic motion"?
Maybe the acceleration is not constant?
 

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