The axle alignment with the chassis of the car has to be that way also. In the mousetrap car drive axle the small circumference spun by the string wrapped around it for a relatively short length propels the much larger drive wheels a much greater distance but with small amount of force. These mousetrap cars have also been built without my help in all parts of the globe. I'm sure something else would work washer, appropriately sized nut, etc , tabs from soda cans was the available shapeable piece of metal I grabbed at the time. That means that large wheels have more rotational inertia than smaller wheels.
However, what I did learn victoriously was perserverance and patience, and in the end hard work did pay off. Those more ambitious might want to brace it with something between the spring and the back to make sure it doesn't snag or fray, but I didn't bother, which does mean the string gets tangled or frays every so often. Assuming your car is a rear-wheel drive car, each time your rear axle turns, the rear wheels turn. Wheels with large amounts of rotational inertia are helpful in some ways, because once the wheels are moving they will be difficult to stop. This will ensure that each of the wheel sizes will receive the same amount of energy. The lever shouldn't bend at all under the stress of the string — this represents wasted energy.
Together, they cited information from. Center the mousetrap on top of the chassis and then, using duct tape or clear packaging tape, secure the mousetrap into place on all 4 sides. Your string is the part that will transfer force from the spring mechanism of your mousetrap to the rear wheels of your car. We often made rash and critical changes to our car, and that put us behind schedule and ended up costing us more work. Chassis — frame of the car to which the other components attach to. This is important because the circumference the part that actually touches the track.
. If the floor has much better grip, it might work ok without them. This is the same concept. Both of these laws should show you that the more massive your car, the more force that will be required to move the car. Small wheels will require more revolutions to move the same distance while large wheels will require more torque to make them begin to turn. Think of the rear wheel of a bicycle; a small drive gear and a large wheel.
No need to introduce so many different notations and different forces. A wooden block placed on a sheet of glass will have an easier time sliding than when the same block is placed on a concrete sidewalk. On my design I used the screw eyes in a way small adjustments could be done on the tracking. Release your car and watch it go. Holding the string tightly, set the car on the ground and carefully let go of the trap — the string should be wound tight enough that it holds the trap in place.
Together, they cited information from. Experiment often, and dont be afraid to make mistakes. However, it will also run out of energy sooner. Acceleration is inversely proportional to the mass. On the other hand a shorter lever arm results in more pulling force that sends the vehicle moving forward as the force travels over a smaller distance from the released hammer to the axle.
Almost any energy source can be used for propulsion with enough ingenuity. Thanks for your help so far. In other words, the goal is to maximize the distance traveled on both these surfaces. Build the lightest frame possible. If you have larger drive wheels, these should go on the rear axle and the smaller wheels on the front axle. When you release the arm, the elastic potential becomes kinetic energy.
Change Wheel Size Wheel and Axle. However, we created traction between the floor and the tire by adding tape to help stabilize the car. Work is the applying a force to an object, and actually moving that object. Take a bit of care, because if the string snaps the trap will indeed close quickly and anything you have in the way will get hit. There are several forms of energy and often one form of energy can be converted to another. In order for the spring to release all its energy, the spring force must be able to turn the drive wheels throughout the range of motion of the spring, as the car travels on the flat surface.
In the perfect universe where there was no friction a mousetrap car would travel forever or until it hits something. However, friction can also occur between the axles and the cars, which can be detrimental to performance. I thought about how I had lots of fun making those way back and decided to make one out of scraps off my desk and document it. Upon release, as the trap moves back to resting position, the string rotates the axle which powers the car. Make sure to test it thoroughly.