i need help with simple formulae!!

AlienGav

I need some help with some basic formulae!!!

I was in college today and the prof was saying something about these equations reguarding linear motion...
I zoned out (totally) and drifted into a day dream..

Anyone know these formulae: (i just need to know if I took them down correctly..)
They are concerned with distance, speed, acceleration and time...

1. u = m + at

2. s = ut + 1/2at²

3. v = m² +2as

Anyone know if these are correct and more importantly. what do they stand for?

Grudaire

Applied math if I'm not mistaken

v = u + at

v^2 = u^2 + 2as

s = ut + 1/2at^2

with
u = initial speed
v = final speed
a = acceleration
t = time
s = distance travelled

Delphi91

AlienGav wrote: »

I need some help with some basic formulae!!!

I was in college today and the prof was saying something about these equations reguarding linear motion...
I zoned out (totally) and drifted into a day dream..

Anyone know these formulae: (i just need to know if I took them down correctly..)
They are concerned with distance, speed, acceleration and time...

1. u = m + at

2. s = ut + 1/2at²

3. v = m² +2as

Anyone know if these are correct and more importantly. what do they stand for?

They are the three basic formula concerned with "rectilinear motion" i.e. motion in a straight line, that you come across in Leaving Cert Physics.

The usual way that you'll see these equations is that they will have a "u" instead of an "m" (but it doesn't really matter what letter you use as long as you are consistent and the letter isn't used to represent any other physical quantity/measurement). In LC physics, m usually represents mass, that's why u is used instead.

The first equation should read:

v = u + at

and the last equation should be

v^2 = u^2 + 2as.

Jonathan

AlienGav wrote: »

I need some help with some basic formulae!!!

I was in college today and the prof was saying something about these equations reguarding linear motion...
I zoned out (totally) and drifted into a day dream..

Anyone know these formulae: (i just need to know if I took them down correctly..)
They are concerned with distance, speed, acceleration and time...

1. u = m + at

2. s = ut + 1/2at²

3. v = m² +2as

Anyone know if these are correct and more importantly. what do they stand for?

I take it as you are a science or engineering student?

dohda

just to clarify:

v = velocity, which the same as final speed.

Not sure how much you zoned out...

mardybumbum

Theres a pretty good explanation of uniform linear motion here