1.4 Design rationales

1.4 Design Rationales

Document clearly the design rationales for the chosen design with respect to the following 5 aspects:

  • Wheels
The wheels should be lightweight and large. With a larger wheel, our mousetrap car is able to travel a longer distance with every rotation. To make it lightweight and large, we will try to make the wheels out of a sheet of cardboard. If needed, we can adjust the size of the wheel.

  • Chassis
The chassis should be lightweight and strong. This is to reduce the amount of force needed to move the mousetrap car but be able to hold up the snapping force of the mousetrap.

  • Lever arm & string type
The lever arm needs to be strong to handle a lot of tensile strength. The level arm should be made out of wood preferably a few chopsticks bundles together. The string needs to be thin but strong in order to make the wheel turn but not add much extra weight. We went with a sewing thread for our string

  • Axles
The axels should be strong and thin. They need to be thin to achieve the maximum rotations possible from a length of string. We used bamboo skewers to make our axels as they are quite strong and relatively thin.

  • Positioning of mousetrap
The mousetrap should be placed in the middle of our mousetrap car as it has the most weight of our most trap car. Where we place our mousetrap would be where the centre of gravity is. So, for our car to be most stable, the mousetrap should be placed in the middle of the car.

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