why not put a dynamo on the wheel of a car?

[jerryyu]

if electricity can be generated through the motion of the bike's wheel, were,'t it generates more energy if it were to be placed on a car wheel?

[ydoaPs]

if electricity can be generated through the motion of the bike's wheel, were,'t it generates more energy if it were to be placed on a car wheel?

It would make it more inefficient in its use of fuel. We do, however, have alternators. Also, electric cars can recoup battery energy similarly using Dynamic Breaking.

[TonyMcC]

If you are thinking along the lines "I'll use the output of the dynamo to power the car and travel for nothing" then forget it!

Edited October 31, 2010 by TonyMcC

[jerryyu]

If you are thinking along the lines "I'll use the output of the dynamo to power the car and travel for nothing" then forget it!

 

I am actually thinking about using that extra energy to power something else on the car

[TonyMcC]

Thats o.k. but the alternator which is usually belt driven by the engine already does that. One advantage is that electrical power is available all the time the engine is running, even when the car is moving slowly or stationary.