Bikes Cars and Boats

asdasd asked:


Okay, so I have to make an electric car using a 3V motor and 2 AA batteries. I have everything connected, and when I have the car not touching the ground, the wheels spin, but when it hits the floor, it stops spinning. How do I increase torque to make it move?

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ron j asked:


lets say a car is traveling from New Youk to Los Angeles.
YOu are assigned to design this car so that it makes it to Los Angeles. YOu are only allowed 10 gallon tank of gas to start and thats the only gas you are allowed to have for the entire trip.

Your car design must be for an electric car that will therefore be able to generate power while it travels from solar energy, using the wind, plus any other innovative ideas you can come up with.

Could this car be designed. HOw many different power sources can you imagine creating as the car travels?

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Stanleymonkey asked:


I have an LED headlight on my bike. If I press the switch once it lights up.
If I press it again, it starts flashing – when I press it again it goes off.

How does that switch work? Does it use transistors in a speciall circuit – or is it something else?

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