# Velocity, Speed, Acceleration...???

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I know thats a lot for one topic XD but i get confused inbetween them all, and before I complete the revision cards for this topic I would prefer to go over the subjects. So far i hav ethe different definitions:

velocity = speed in a given direction

speed = the rate at which an object moves

acceleration = the rate at which a body increases in speed

Is this correct? What else do we need to know?

Posted: 28-12-09 09:57 by I P B

Hi, i will happily go over all of my notes with you - i have just finished writing out all of my notes for the physics topic.

You are missing:

Moment (Nm) = Force (N) X Distance (m)

Posted: 28-12-09 13:33 by John

ok thankyou! I shall add it

Posted: 28-12-09 16:59 by I P B

John, can we go over the notes on the forum so it stays ehre for everyone to access instead of on email?

Posted: 28-12-09 21:09 by I P B

I seriously do not get this concept at all please, can someone give me short facts that we need to know for the exam!...

thankyou!! XD

Posted: 28-12-09 21:58 by Tania

Well, its basically what IPB said -

"velocity = speed in a given direction

speed = the rate at which an object moves

acceleration = the rate at which a body increases in speed"

You also need to know 2 equations -

speed = distance Ã· time, and Acceleration = change in velocity Ã· time taken for change

I remember that there were distance/time graphs and velocity/time graphs asl

Â· The slope of a distance-time graph represents speed.

Â· The velocity of a body is its speed in a given direction.

Â· The slope of a velocity-time graph represents acceleration.

Â· The area under a velocity-time graph represents distance travelled.

Theres alot more though lol, soz i can't remember that much

Posted: 29-12-09 17:30 by RATM33

Thanks RATM33! Thats great info

Posted: 29-12-09 18:07 by I P B

whoa thankyou!!!!!

a great huge thanks!!!XD

Posted: 29-12-09 19:10 by Tania