Thames & Kosmos Kinetic Machines: (Engineering Makerspace) handleiding

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Thames & Kosmos

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Handleiding

Kinetic Machines

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You can do this thanks to your

muscles. When you stretch the band,

you’re storing mechanical energy

in it. Because the band is elastic, it

instantly tries to revert to its previous

shape. In doing so, it releases the

energy it had stored, again in the

form of mechanical energy. This

gives your model the push that it

needs.

In terms of physics, winding up

a rubber band is work that you

perform. Therefore, the energy that

is stored in the rubber band is stored

Your will also have to put

energy into your rubber band.

This trick is also used by tight-rope

walkers at the circus:

The dragonfly’s center of gravity is

located beneath its support point.

This is due to the downward angle of

the “wings.” These are comparatively

heavy. This means that the dragonfly

is not really balancing — it only looks

as if it is — instead, it is essentially

hanging from the point. However, this

actually makes it far more stable, and

prevents it from toppling over if you

give it a little nudge.

work. Your model can then use this

energy to perform other work, such as

rolling forward or catapulting a ball,

for example.

Dragonfly

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