WEBVTT

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What changes when prey moves faster?. Incoming motion carries kinetic energy: Eₖ = ½mv². Keep mass fixed and notice that speed is squared.

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Begin with one milligram. Use an illustrative mass of 1 mg: 0.000001 kg. At 1 m/s, its kinetic energy is 0.5 microjoules.

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Now double the speed. At 2 m/s, the same 1 mg object carries 2 microjoules. Twice the speed gives four times the kinetic energy.

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The web must respond. Silk deformation can store some incoming energy and dissipate some. Geometry and load sharing also shape how a web responds.

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Energy alone cannot predict capture. Glue contact, impact position, anchors, and the animal's behavior still matter. This calculation is an example, not a measured capture result.

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Test one change in the lab. Keep stiffness and energy loss fixed. Increase only impact energy, predict the change, and compare the orb model's motion.