cushioncrawler

08-03-2012, 03:42 PM

I used to hav trouble understanding momentum and energy. Still do.

Momentum iz eezyest.

Momentum = mv , ie mass by speed.

And change in momentum = Ft , ie average force by time.

In an impakt overall momentum stays the same, ie momentum iz konserved.

If a qball hits a red the total speed stays the same.

If qball speed before impakt iz 5 and red's speed after impakt iz 2 then i know that the qball speed iz 3 (if balls hav same wt).

This iz eezyer to understand when u konsider that change in momentum iz Ft.

In an impakt the qball feels the same forces az the red, for the same times.

Therefore the momentum lost by the qball must be equal to the momentum gained by the red.

This iz allways so, for all impakts, no matter what sort of impakt.

What the law aktually means iz that action and reaction forces are allways equal -- its one of Newton's laws.

Its even simpler. Total V stays the same.

If the qball speeding at 5 hits 3 stationary balls then u know that immediately after impakt the 4 speeds add to 5 (a bit less than 5 if the impakts are not simultaeneous, ie the balls slow down over time).

Getting back to the kamui hitting the qball, u shoodnt say that the qtip absorbs some of the momentum of the kamui-qball impakt.

In a way it duzz, temporaryly at least (ie a bit of vibration during impakt kan be sayd to be stored momentum, but after impakt none of the heat or vibration iz what we call momentum).

But it iz ok to say that the kamui absorbs energy.

It absorbs some energy temporaryly during impakt and some of this remains in the kamue after impakt (ie heat and vibration).

Energy iz lost during all impakts.

Or putting it another way, energy iz never lost or gained, it just changes form.

But overall momentum iz never lost or gained, and it never changes form.

Talking about impakts here.

What about rotational momentum i hear u ask.

Rotational momentum iz eezy. There iz no such thing.

Rotational momentum iz purely a math trick. Dont be fooled -- mathematicianologysts are.

mac.

SHITSU-TONKA FRIED WHALE -- FINGERLICKEN GOOD.

Momentum iz eezyest.

Momentum = mv , ie mass by speed.

And change in momentum = Ft , ie average force by time.

In an impakt overall momentum stays the same, ie momentum iz konserved.

If a qball hits a red the total speed stays the same.

If qball speed before impakt iz 5 and red's speed after impakt iz 2 then i know that the qball speed iz 3 (if balls hav same wt).

This iz eezyer to understand when u konsider that change in momentum iz Ft.

In an impakt the qball feels the same forces az the red, for the same times.

Therefore the momentum lost by the qball must be equal to the momentum gained by the red.

This iz allways so, for all impakts, no matter what sort of impakt.

What the law aktually means iz that action and reaction forces are allways equal -- its one of Newton's laws.

Its even simpler. Total V stays the same.

If the qball speeding at 5 hits 3 stationary balls then u know that immediately after impakt the 4 speeds add to 5 (a bit less than 5 if the impakts are not simultaeneous, ie the balls slow down over time).

Getting back to the kamui hitting the qball, u shoodnt say that the qtip absorbs some of the momentum of the kamui-qball impakt.

In a way it duzz, temporaryly at least (ie a bit of vibration during impakt kan be sayd to be stored momentum, but after impakt none of the heat or vibration iz what we call momentum).

But it iz ok to say that the kamui absorbs energy.

It absorbs some energy temporaryly during impakt and some of this remains in the kamue after impakt (ie heat and vibration).

Energy iz lost during all impakts.

Or putting it another way, energy iz never lost or gained, it just changes form.

But overall momentum iz never lost or gained, and it never changes form.

Talking about impakts here.

What about rotational momentum i hear u ask.

Rotational momentum iz eezy. There iz no such thing.

Rotational momentum iz purely a math trick. Dont be fooled -- mathematicianologysts are.

mac.

SHITSU-TONKA FRIED WHALE -- FINGERLICKEN GOOD.