1. ## what is sec2?

what is sec2 for "3.5 metres/sec2"

2. ## Re: what is sec2?

Picture the 2 raised up a bit - per second squared.

3. ## Re: what is sec2?

Perhaps...

but it does not have the same meaning as in y = x2 + 2x +1

metres/sec2 is referring to acceleration, and is shorthand for
metres per second per second, or metres/sec/sec

4. ## Re: what is sec2?

I think it's exactly what Barb said, metres per second per second, or metres per second squared.

Note that on keyboards people often use the circumflex to show exponents (powers, surds): m/s^2 or ms^-2

5. ## Re: what is sec2?

OH?
konungursvia:
Perhaps my maths is rusty.
Could you explain to me how,
(with the formula for acceleration being
a = (final velocity - initial velocity)/t )
and so yielding an average, that this is also a mathematical exponential?????

There is a difference between shorthand - gg , and st as I would write for 'going' and 'something', for examples, when taking lecture notes, minutes, whatever - and mathematical operations.

6. ## Re: what is sec2?

Originally Posted by David L.
OH?
konungursvia
Perhaps my maths is rusty.
No it is not. You hit the nail on the head.

7. ## Re: what is sec2?

It just occurred to me.
Please don't tell me konungursvia that you are suggesting that I was asserting that X^2 does not have the same meaning as X2, where, as Barb said, you need to picture "the 2 raised up a bit".
That all of this is because of keyboard limitations in representing mathematical symbols?

icon for GROAN if so.

8. ## Re: what is sec2?

I think it might have been such a misunderstanding. I don't see any errors in anything any of us has written or asserted! Just different angles. :)

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