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Elasticity in PVC powered catapults


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PVC powered catapults work on the principle of elasticity. Elasticity is the tendency of solid materials to return to their original shape when contorted. This means that when the top of a PVC pipe is pulled back, an elastic force will attempt to return it to its original position. This means that if the pipe is pulled back and then released the elasticity will whip it forward launching the object.

There are two main measures of elasticity, the modulus and the elastic limit. The modulus is a measure of the force required to deform the object and the elastic limit is a measure of how far an object can be deformed while maintaining elasticity. The elastic limit is important in the construction of PVC powered catapults because if exceeded the pipe will not return to its original position and therefore will not launch.

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