Help understanding formula (1 Viewer)

[Twickel]

Hi
I used this equation V= a x Square root of 2d/a to find final velocity, is this accurate?

The other equation v=u +at uses time to consider the velocity but the first equation takes into consideration distance and not time?

So is it ok to use the first formula?

 

[kaz1]

Never heard of that equation. Are you sure you don't mean v²=u² + 2as ?

 

[Twickel]

http://community.boredofstudies.org/showthread.php?t=178647

Someone from that told me.

 

[Twickel]

Oh I am using v= u+t in a different way. Look the square root of 2d/a is the time. Then I times it by a so its v=at.

 

[Aerath]

You know...I really have no idea what sorta formulas you're talking about. Are they even part of the syllabus?

 

[lolokay]

lol why do you have a inside and outside the square root?

if you square your formula you get
v² = 2ad
which is the same as v²=u² + 2as
when the intial velocity is 0