PHYSICAL QUANTITY

Work: formulas and units of measurement

Work: symbol A, unit J. Formulas and explanations for Mechanics, Electricity, MCT and thermodynamics.

A

\text{Dzh}

joule

KEY CONNECTIONS

Formulas

A = F S cos α

A = FS cos α

A = q U

A = qU

A = U I t = I^{2} R t = \frac{U ^{2}}{R} t

A = UIt = I²Rt = (U²/R)t

A = P t

A = Pt

A = q E d

A = qEd

A = p Δ V = \frac{m}{M} R Δ T

A = pΔV = (m/M)RΔT

A_{st} = E q

Ast = εq

Q = Δ U + A

Q = ΔU + A

NOTATION

Quantities in formulas

$A$: Work is a measure of energy transferred when a force is applied.
$F$: Force is a measure of the interaction of bodies that changes their movement or shape.
$S$: Distance - the length of the space between selected points.
$\alpha$: Angle is a quantity characterizing the mutual rotation of directions.
$q$: Electric charge is a quantity that determines the participation of a body in electrical interaction.
$U$: Electric voltage is the work done by the electric field when transferring a unit charge.
$I$: Current strength is the charge passing through the cross section of a conductor per unit time.
$t$: Time is a quantity characterizing the duration and sequence of events.
$R$: Electrical resistance is a measure of a conductor's resistance to electric current.
$P$: Power is the speed of doing work or transferring energy.
$E$: Electric field strength is the strength characteristic of the electric field.
$p$: Pressure is the force per unit surface area.
$\Delta V$: Volume change is the difference between the final and initial volume.
$m$: Mass is a scalar physical quantity that is a measure of the inertia of a body.
$M$: Molar mass is the mass of one mole of a substance.
$R$: The universal gas constant is the coefficient of connection between the parameters of an ideal gas.
$\Delta T$: Temperature change is the difference between the final and initial temperatures.
$A_{\text{st}}$: The work of external forces is the energy transferred to the charge by non-electrostatic forces.
$\mathcal{E}$: Electromotive force is the work of external forces during the transfer of a unit charge.
$Q$: The amount of heat is the energy received or given off by a body during heat exchange.
$\Delta U$: The change in internal energy is the magnitude of the change in the energy of the particles of the system.

THEORY

PRACTICE

Work: formulas and units of measurement

Formulas

Quantities in formulas

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