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How to Build Fast LEGO Cars

If you want to build a really fast LEGO car, you have to know some simple Laws of Physics. Contrary to popular belief, placing weights on the car will not change the rate of acceleration. The best way to make your LEGO car speedy is decrease the friction and air resistance.

Things You'll Need

2 triangle shaped LEGO pieces
1 rectangular shaped LEGO piece
4 plastic LEGO wheels
4 wheel connection LEGO pieces
Various small LEGO pieces

Instructions

- 1
  
  Race cars have a special aerodynamic design to decrease the drag force called "air resistance."
  
  Push together two triangular LEGO pieces to build a pointy nose for your LEGO car. Decreasing the surface area of the front end reduces air resistance.
- 2
  
  The arrow design decreases the drag force created by air.
  
  Attach the triangle shaped front end to the rectangular LEGO piece. The point is the front end and the rectangle is the back end of your car.
- 3
  Press on small LEGO pieces to firmly connect the front and back end together. The design of your LEGO car should stay long and sleek.
- 4
  
  The rubber treads on tires create friction against a surface.
  
  Attach four hard plastic LEGO tires, not rubber tires, on each of the four ends using wheel connection LEGO pieces. Hard plastic LEGO tires create less friction than rubber LEGO tires. Friction is another force that can slow down your LEGO car.
- 5
  Push car from the rear rectangular end over a smooth surface. The surface can be flat or angled like a ramp.

Educational Toys