PHYSICAL QUANTITY
Work: formulas and units of measurement
Work: symbol A, unit J. Formulas and explanations for Mechanics, Electricity, MCT and thermodynamics.
Ajoule
KEY CONNECTIONS
Formulas
A = FS cos α
A = qU
A = UIt = I²Rt = (U²/R)t
A = Pt
A = qEd
A = pΔV = (m/M)RΔT
Ast = εq
Q = ΔU + A
NOTATION
Quantities in formulas
- Work is a measure of energy transferred when a force is applied.
- Force is a measure of the interaction of bodies that changes their movement or shape.
- Distance - the length of the space between selected points.
- Angle is a quantity characterizing the mutual rotation of directions.
- Electric charge is a quantity that determines the participation of a body in electrical interaction.
- Electric voltage is the work done by the electric field when transferring a unit charge.
- Current strength is the charge passing through the cross section of a conductor per unit time.
- Time is a quantity characterizing the duration and sequence of events.
- Electrical resistance is a measure of a conductor's resistance to electric current.
- Power is the speed of doing work or transferring energy.
- Electric field strength is the strength characteristic of the electric field.
- Pressure is the force per unit surface area.
- Volume change is the difference between the final and initial volume.
- Mass is a scalar physical quantity that is a measure of the inertia of a body.
- Molar mass is the mass of one mole of a substance.
- The universal gas constant is the coefficient of connection between the parameters of an ideal gas.
- Temperature change is the difference between the final and initial temperatures.
- The work of external forces is the energy transferred to the charge by non-electrostatic forces.
- Electromotive force is the work of external forces during the transfer of a unit charge.
- The amount of heat is the energy received or given off by a body during heat exchange.
- 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→Gas operation and engine design8 class · 22 min→Current, voltage and devices8 class · 26 min→Operation, power and energy consumption8 class · 24 min→Work, power and energy conservation9 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 · 9 problems→Heat engines8 class · 6 problems→Electric current8 class · 6 problems→Work and current power8 class · 6 problems→Conservation laws10 class · 17 problems→Thermodynamics10 class · 12 problems→Electrostatics10 class · 12 problems→Direct current10 class · 11 problems→Quantum physics11 class · 17 problems→
DIRECTORY
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