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## a car that runs on a battery that never needs to get charged

A dynamo produces electricity when it is turned and batteries gives energy to motors to turn a wheel.while the wheel is turning we can use this energy to turn the dynamo and produce electricity that charges the battery at the same time the car is moving.Of course we will need a huge battery but by nano technology we can minimize the size by using nano-batteries.

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Jul 18 2013: So it transformes mechanical energy to electricity without any loss

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Jul 17 2013: Ooh,what i meant is that the battery is charged already and ready for use and when it needto get charged again it is charged by a dynamo
• #### wayne uejio30+

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Jul 17 2013: perpetual motion machines are impossible with today's technology. Converting mechanical energy (movement) to electricity will have a loss due to friction and generating electricity. Charging a battery also loses energy.

Adding another generator means more weight and more loss due to friction.

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Jul 17 2013: Then how does a dynamo produce electricity
• #### wayne uejio30+

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Jul 18 2013: rotating coils and magnetic field with a commutator to convert it to steady dc. check out Faraday Law of Induction
• #### edward long100+

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Jul 17 2013: A battery is a STORAGE device. If you continue to take-away from the stored energy and never replace it (recharge), the supplied voltage WILL go to zero and you will be without power. Ain't nothin' free, Mugharad!

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Jul 17 2013: There is something that recharges it and its the dynamo
• #### edward long100+

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Jul 17 2013: I interpreted your statement, ". . . runs on a battery that never needs to get charged." to mean the battery never needs to get charged.
• #### Krisztián Pintér200+

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Jul 17 2013: i can fly using the following method: i grab my own clothing, and lift myself up in the air. then with the other hand, i just push myself around.

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Jul 17 2013: Doesn't seem logical and btw you're not funny :)
• #### Krisztián Pintér200+

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Jul 17 2013: why do you think i have said that? goofing around, or maybe i had a point?

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Jul 17 2013: Whats your point then?
• #### Lawren Jones20+

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Jul 17 2013: His point, Mugharad, as has also been pointed out to you by most other responders, is that what you're suggesting is impossible as specifically stated by the first law of thermodynamics.
• #### Krisztián Pintér200+

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Jul 17 2013: not going to explain differently. i feel it is enough.

• #### Krisztián Pintér200+

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Jul 17 2013: or to provoke thinking. sometimes works. sometimes doesn't.
• #### Bo Jiang

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Jul 17 2013: I think it is not possible. In terms of energy balance, the car would have rub with ground, thus it consumes energy.
Besides, what you thought is ideal condition, because no efficiency is 100%, i.e. dynamo cannot convert mechanical energy into electrical energy with 100% efficiency.