PHYSICAL QUANTITY
Work: formulas and units of measurement
Work: symbol A, unit J. Formulas and explanations for Mechanics, Electricity, MCT and thermodynamics.
AA\text{Дж}joule
KEY CONNECTIONS
Formulas
A=FS\cos\alphaA = FS cos α
A=qUA = qU
A=UIt=I^2Rt=\frac{U^2}{R}tA = UIt = I²Rt = (U²/R)t
A=PtA = Pt
A=qEdA = qEd
A=p\Delta V=\frac{m}{M}R\Delta TA = pΔV = (m/M)RΔT
A_{\text{ст}}=\mathcal{E}qAст = εq
Q=\Delta U+AQ = 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{ст}}
- 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
Related Lessons
Mechanical work and power7 class · 20 min→Efficiency and mechanical energy7 class · 24 min→Work done by gas and how engines work8 class · 22 min→Current, voltage and measuring instruments8 class · 26 min→Work, power and energy consumption8 class · 24 min→Work, power and conservation of energy9 class · 30 min→Work, power and energy10 class · 28 min→Internal energy and the first law10 class · 26 min→Potential and voltage10 class · 24 min→Current, resistance and Ohm's law10 class · 28 min→Photons and the photoelectric effect11 class · 30 min→
PRACTICE
Related tasks
Work, power and energy7 class · 27 problems→Heat engines8 class · 18 problems→Electric current8 class · 18 problems→Work and current power8 class · 18 problems→Work and Energy9 class · 9 problems→Conservation laws10 class · 29 problems→Thermodynamics10 class · 24 problems→Electrostatics10 class · 30 problems→Direct current10 class · 23 problems→Quantum physics11 class · 23 problems→
DIRECTORY