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Old 12-21-2009, 01:25 AM
 
Location: Bradenton, Florida
27,236 posts, read 44,153,407 times
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Nope, it's not free--you have to expend energy to get energy. Energy you'd be expending anyhow.
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Old 12-21-2009, 03:09 AM
 
41,817 posts, read 46,650,773 times
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Quote:
Originally Posted by TKramar View Post
Nope, it's not free--you have to expend energy to get energy. Energy you'd be expending anyhow.
Lol... read what posted again.

If it takes X amount of energy to push the cart and you add a generator with resistance you have to increase the amount of energy required to move it. We could put a generator on the wheel that has very little resistance but with less resistance the amount of electricity generated also drops.
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Old 12-21-2009, 03:22 AM
 
Location: Earth
24,629 posts, read 26,683,821 times
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Once again, what's a moonbat?
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Old 12-21-2009, 03:48 AM
 
11,944 posts, read 13,857,958 times
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Originally Posted by thecoalman View Post
Maybe they put giant Hamster wheel at entrance of store?

I'm all for innovation and good ideas but this isn't one of them, if a fitness center had gym equipment that harnessed the power of people working out you have a good idea.
OHhhh but they DO! Living with Ed (Ed Begley) has a bicycle that cooks his toast ROFL. I can think of worse things people do, and see no reason to complain at them when they're on their own dime coal. Live and let live goes both ways.
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Old 12-21-2009, 04:03 AM
 
Location: Bradenton, Florida
27,236 posts, read 44,153,407 times
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Quote:
Originally Posted by thecoalman View Post
Lol... read what posted again.

If it takes X amount of energy to push the cart and you add a generator with resistance you have to increase the amount of energy required to move it. We could put a generator on the wheel that has very little resistance but with less resistance the amount of electricity generated also drops.
The force that you expend to PUSH the cart, can be translated into energy, without increasing the resistance any. You induce a current every time the wheel goes around. It might not be much, but it adds up over half an hour (or more).

If you're only getting one or two things, you probably wouldn't be using a cart, and can get in and out. But if you're using a cart, you're probably going to be getting a number of items and spending time in the store.

You already have to expend the energy to push the cart, why not lower costs--which can lead to lower prices--by not wasting that energy?
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Old 12-21-2009, 04:07 AM
 
41,817 posts, read 46,650,773 times
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Originally Posted by chielgirl View Post
Once again, what's a moonbat?
I answered that previous thread, possibly to your inquiry. Take your own advice you have a proclivity to hand out and "use the search feature".
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Old 12-21-2009, 04:08 AM
 
41,817 posts, read 46,650,773 times
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Originally Posted by TKramar View Post
The force that you expend to PUSH the cart, can be translated into energy, without increasing the resistance any. You induce a current every time the wheel goes around. It might not be much, but it adds up over half an hour (or more).
You failed physics right?

Quote:
You already have to expend the energy to push the cart, why not lower costs--which can lead to lower prices--by not wasting that energy?
That's debatable and depends, again more resistance will produce more energy but it's harder to push. If the extra cost of the cart, the extra energy needed to create it and the energy expended for the other things required doesn't produce net energy over the life of the cart then it would be wasteful. My guess is the net energy is going to be negative since people aren't going to be happy pushing a brick around. Do some research on "life cycle". Just because something can produce energy doesn't mean it's feasible.
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Old 12-21-2009, 04:13 AM
 
Location: Bradenton, Florida
27,236 posts, read 44,153,407 times
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No--I didn't. More importantly, I worked as an electrician. I know how to convert one form of energy to another. Kinetic to electrical, chemical to electrical, etc.
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Old 12-21-2009, 04:21 AM
 
Location: Bradenton, Florida
27,236 posts, read 44,153,407 times
Reputation: 11027
Quote:
Originally Posted by thecoalman View Post
You failed physics right?

That's debatable and depends, again more resistance will produce more energy but it's harder to push. If the extra cost of the cart, the extra energy needed to create it and the energy expended for the other things required doesn't produce net energy over the life of the cart then it would be wasteful. My guess is the net energy is going to be negative since people aren't going to be happy pushing a brick around. Do some research on "life cycle". Just because something can produce energy doesn't mean it's feasible.
This assumes you HAVE to add resistance over the force of friction. You do not. Turning the wheels would generate the electricity.
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Old 12-21-2009, 04:30 AM
 
41,817 posts, read 46,650,773 times
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Here's simple example, if we have a cart without the generator on it and give it a good push it might go 10 feet. The cart will stop at 10 feet because of friction in the ball bearings, wheels, or even the air it had to move.

If we get a cart and put a generator on one of those wheels it's going provide additional resistance, this time if we push it with the same amount of energy it might only go 5 feet. How far it will will go depends on how much more resistance the generator has added. In any event the cart cannot go ten feet with the generator without adding additional force when we push it.
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