From the formula 2as = v(adsbygoogle = window.adsbygoogle || []).push({}); ^{2}- u^{2}

I made v the subject...and it becomes -

(2as+u^{2})^{1/2}= v

Problem is real world value of 2as is negative...as a result it makes a complex answer...but actually its not; instead the value of v should also come negative.

Here a, u are negative...and a force applies on the body in the same direction as u, which is negative, as a result a negative a cause of that very force.

So the v should also be real and negative...but its coming as complex

Say...can I take the a and u to be positive initially and add the negative sign to the result...sounds ok to me.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Mathematical problem is classical question

**Physics Forums | Science Articles, Homework Help, Discussion**