Sainsbury's nicking petrol off customers?

banger9365

Pew_Pew_Pew_Lasers! wrote: »

!!!!ing hell, there are some tightar3es on here.

agreed +1

by the way turn your engine off and coast over it no fuel used then :T:T:T:rotfl::rotfl::rotfl:
spelt coast wrong

hundredk

pgilc1 wrote: »

Only if you werent going to brake to stop at the pumps.

Even if you were..it's your enery/momentum to waste in the first place.

Lemonade_Pockets

MRab2 wrote: »

I don't need to - My Masters degree in Mechanical Engineering taught me quite a bit about potential energy. Like for example; you can't actually extract energy from a potential energy system. Why? Well, you have to expend energy getting it up there in the first place - and thanks to the 2nd law of thermodynamics you expend MORE energy getting it up there than you can ever extract from it on the way down.

Don't disagree with any of that. Just to enlighten me what happens if your taking a walk at beachy head and by accident you walk to far. Your not expending any more energy then you would of been anyway but suddenly your gaining a whole lot more on the way down?? No???

Alternatively if you'd like to explain your theory in more detail i'm happy to learn.

Redmikee

LandyAndy wrote: »

Surely by reversing you'd be sucking the energy back out of the store and into your car?;):D

Thats Brilliant, :rotfl:another way to get your energy back would be to install one on your street and get sainsburys to deliver.

mikey72

Lemonade_Pockets wrote: »

Don't disagree with any of that. Just to enlighten me what happens if your taking a walk at beachy head and by accident you walk to far. Your not expending any more energy then you would of been anyway but suddenly your gaining a whole lot more on the way down?? No???

Alternatively if you'd like to explain your theory in more detail i'm happy to learn.

Don't you then need to bounce back up on a big spring as well?

Lemonade_Pockets

mikey72 wrote: »

Don't you then need to bounce back up on a big spring as well?

Maybe if you wanted to return to your original position!

mikey72

Well, I hope Sainsburys won't be leaving my car 500ft down, it'll be a long walk with the shopping.

Lemonade_Pockets

Hehehehe now that would be something to whinge about

Bowdyjan18

fs op who cares honestley ?

ailuro2

Combustion engine convers chemical energy into kinetic energy.

While energy can't be created or destroyed it can differ between useful energy (making your car go) and nor-so useful energy( the heat that comes from the back of your fridge is hardly going to dry a load of washing, is it?)

They are taking the motion of the car going over the plates and converting that movement into electrical energy.

I don't see the problem, you're driving over a road, or driving over a plate.

You could probably liken it to a dynamo on a bike - you ride the bike and the movement was lighting your bikelamp - but you still cycled along the road and didn't think it was stealing any energy from you.:p