PHYSICAL QUANTITY

Elongation: formulas and units of measurement

Elongation: symbol Δl, unit m. Formulas and explanations for Mechanics.

\Delta l

Δl

\text{m}

meter

KEY CONNECTIONS

Formulas

Δ l = l - l_{0}

Δl = l − l₀

F_{elastic} = k ∣ Δ l ∣

Fupr = k|Δl|

ε = \frac{Δ l}{l _{0}}

ε = Δl / l₀

\frac{σ}{E} = \frac{Δ l}{l _{0}}

σ / E = Δl / l₀

NOTATION

$\Delta l$: Elongation is a change in the length of a body during deformation.
$l$: Length is the linear dimension of a body or area of space.
$l_0$: Initial length - the length of the body before deformation.
$F_{\text{elastic}}$: Elastic force is a force that occurs when a body deforms.
$k$: The stiffness of a spring is a characteristic of its resistance to deformation.
$\varepsilon$: Relative deformation is the proportion of change in length compared to the initial length.
$\sigma$: Mechanical stress is the internal force per unit cross-sectional area.
$E$: Young's modulus is a characteristic of a material's resistance to elastic deformation.

THEORY

PRACTICE