proportionality: \(F\propto S\)
17.2 Universal ratio: $\frac{F}{S}=k$.
17.3 Greater travel: S↑⇒F↑.
17.4 Lower travel: S↓⇒F↓.
17.5 Zero boundary: S=0⟺F=0.
17.6 Interval consistency: $F_i=ks_i$.
17.7 Complete-operation consistency: $F=kS$.
proportionality: \(F\propto S\)
17.2 Universal ratio: $\frac{F}{S}=k$.
17.3 Greater travel: S↑⇒F↑.
17.4 Lower travel: S↓⇒F↓.
17.5 Zero boundary: S=0⟺F=0.
17.6 Interval consistency: $F_i=ks_i$.
17.7 Complete-operation consistency: $F=kS$.