Reply to: The rate of the rate of the rise in rising inflation is falling!

[lilelvis2000]

In a related item...Did anybody catch the BBC 4 documentary The Story of Maths last night? BBC - BBC Four Programmes - The Story of Maths

[conned tractor]

Usually when people go to the trouble to say displacement they refer to the vector quantity describing the shortest path between two points, they don't usually go out of their way to describe displacement as a scalar. Distance is usually the word used for that.
Displacement (vector) - Wikipedia, the free encyclopedia

Anyway, that's my limit. [another pun]

Your puns are as bad as your maths.

[TimberWolf]

In the above example, v = dd/dt, since d = x-y.

Would it be easier to understand if it was in s-notation.

Usually when people go to the trouble to say displacement they refer to the vector quantity describing the shortest path between two points, they don't usually go out of their way to describe displacement as a scalar. Distance is usually the word used for that.
Displacement (vector) - Wikipedia, the free encyclopedia

Anyway, that's my limit. [another pun]

[conned tractor]

Incidentally displacement is a vector quantity. Not that vectors are relevant anyway, as you can take derivatives of quantities other than vectors! Speed, for example. Thanks for ruining my great little pound pun with all this illiterate nonsense though

In the above example, v = dd/dt, since d = x-y.

Would it be easier to understand if it was in s-notation.

[TimberWolf]

Position is generally referred to as displacement as it is a scalar quantity, but they are the same in this case.

Incidentally displacement is a vector quantity. Not that vectors are relevant anyway, as you can take derivatives of quantities other than vectors! Speed, for example. Thanks for ruining my great little pound pun with all this illiterate nonsense though

[TimberWolf]

Displacement is correct here. Displacement is the change in position, and the derivative of this displacement is velocity. The second derivative of displacement is acceleration.

d = x - y (linear displacement)

v = d / t

a = v / t

where x, y are scalar coordinates, d = dispalcement, v = velocity, t = time, and a = acceleration.

V = dx/dt to be more precise, you're describing average speed and acceleration. The dx, the displacement, approaches zero at the limit, which is also the position where you wish to take the derivative. v = d/t only works for very small d or where acceleration = 0 for example.

[conned tractor]

Stone me, I didn't mean to start the calculus wars all over again.

What's that zeity, the academics can 'ave the code monkeys any day....yea I agree...well said.

[rd409]

position

The original article was referring to a change in the rate of inflation rather than a third derivative.

Displacement is correct here. Displacement is the change in position, and the derivative of this displacement is velocity. The second derivative of displacement is acceleration.

d = x - y (linear displacement)

v = d / t

a = v / t

where x, y are scalar coordinates, d = dispalcement, v = velocity, t = time, and a = acceleration.

[conned tractor]

position

The original article was referring to a change in the rate of inflation rather than a third derivative.

Position is generally referred to as displacement as it is a scalar quantity, but they are the same in this case.

[TimberWolf]

Sorry buddy, but acceleration is the second derivative of displacement.

The second derivative of velocity is the rate of change of acceleration.

Disclaimer: Not that the original header makes any sesne any how.

position

The original article was referring to a change in the rate of inflation rather than a third derivative.

[conned tractor]

Is the third derivative African or European ?

Dunno, African? Go on, do tell.

[amcdonald]

Sorry buddy, but acceleration is the second derivative of displacement.

The second derivative of velocity is the rate of change of acceleration.

Disclaimer: Not that the original header makes any sesne any how.

Is the third derivative African or European ?

[conned tractor]

Just put it into everyday terms. Inflation is the speed of a money printing ball thrown into the air, while the second derivative is the acceleration of the money ball. So if a money ball were thrown into the sky fast enough, and even were the acceleration of the money ball negative, the money ball might never come back and would escape the influence of the money printing machine forever and never come back.

Sorry buddy, but acceleration is the second derivative of displacement.

The second derivative of velocity is the rate of change of acceleration.

Disclaimer: Not that the original header makes any sesne any how.

[MarillionFan]

I'm sorry I cannot be with you this week to take part in all of this gloom, but I have been day trading Yell since last week and have managed to make an extra £12k since Friday to cover any inflation.

Don't let me stop you talking about it though. I'm back off to III.

[Bunk]

Just put it into everyday terms. Inflation is the speed of a money printing ball thrown into the air, while the second derivative is the acceleration of the money ball. So if a money ball were thrown into the sky fast enough, and even were the acceleration of the money ball negative, the money ball might never come back and would escape the influence of the money printing machine forever and never come back.

So if inflation reaches 25,000mph we're all flipped?