Cantilevers and Extension

Tether Extension Is a Difference

A stretched molecule length is measured from anchor to bead. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.

highlighted = computed this step

Tether extension is a difference

The anchor is at 1 metre and the bead is at 7 metres.

7−17\mathbin{-}1
Tether extension ledgerAnchor and bead positions define extension.anchorbeadextensionexcess

Endpoint difference gives the stretched length

The extension is 6 metres.

7−1=67\mathbin{-}1=6
Tether extension ledgerAnchor and bead positions define extension.anchorbeadextensionexcess