Collin

"I have no special talent. I am only passionately curious" - Albert Einstein

Tag: science

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A rubber band car works by converting potential energy stored in the stretched rubber band into kinetic energy of the car’s movement. When the rubber band is pushed, it gains potential power, stored as elastic potential energy. When the rubber band is released, it contracts, and the potential energy is converted into kinetic energy, causing the car to move forward.

The transfer of energy in a rubber band car can be explained through the principle of conservation of energy. According to this principle, energy cannot be created or destroyed but can be converted from one form to another. In the case of a rubber band car, the potential energy stored in the stretched rubber band is converted into kinetic energy as the rubber band contracts, and the vehicle moves forward.

Initially, the rubber band car is at rest, and all its energy is in the form of potential energy stored in the stretched rubber band. As the rubber band is released, the potential energy is converted into kinetic energy, which causes the car to move forward. The vehicle’s kinetic energy depends on its mass and the speed at which it moves.

After the last change, the rubber band car is working perfectly fine(mostly). What we thought was interesting was that we could change our car’s engine level(how many rubber bands a time). However, there are still parts we can improve on, such as the decoration and the wheels(they move wobbly )

It is perfect for the environment as it causes no environmental damage, is purely green energy, and is reusable(it doesn’t need a battery.) The best audience is students who have just started learning about energy because this is a fun/exciting, and very visual toy that can show the convention of energy.

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this is our current product.

After showing it to Micheal and Eugene they all bring up a problem which is the car automatically stops itself because the rubber band is stuck on both sides after is finished with the rotation it does not fully use its energy. Mr Hussack said that maybe we can look into how toy cars work. Also, sunnie(who is also doing a rubber band car) told us that the most probable way is to just not let the rubber band be tied to the engine, only to the car.

our plan is to tear the rubber band off. set the anchor to somewhere further ahead and not tie the engine this time.

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I am making a toy that represents the transfer of energy.

some ideas that went through use were:

cross bow

pro:  pretty cool

con: many people doing it, not creative, dangerous-not very well for educational purposes

rubber band car

pro: easy to use and understand.

con: easy to break

handshake the light bulb

pro: can make the students feel the consuming of energy/resistance there

con:just not very cool and creative

and a self-design that includes mixing the structure of saving energy in a music box and a light bulb together.

pro: very unique, probably only in the school every existed

con: no one has done it online, so if I had a logical mistake, no one can correct me

in the end, we decided to use the rubber band car because it is easy to make, reliable and the energy transfer is observable with the naked eye.

three videos we watched were:

my targeted audience is students who just begin learning about the concept of energy and power.( this product can also help represent how energy became power). As energy is not observable by the naked eye and is a new topic, somethings it is challenging to understand as a student. the product can show the energy transfer and is fun in the same time,

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