Energy and Power Formulas in Physics
This page presents a comprehensive overview of essential formulas in physics, focusing on energy and power calculations. The formulas are organized into distinct categories for easy reference and understanding.
Definition: Énergie cinétique KineticEnergy is the energy possessed by an object due to its motion.
The kinetic energy formula is given as:
Vocabulary: Ec = 1/2 × m × v^2, where Ec is kinetic energy, m is mass, and v is velocity.
This formula is crucial for understanding the théorème de l'énergie cinétique formule and provides a basis for comment calculer la vitesse avec l'énergie cinétique et la masse.
The page also introduces the concept of mechanical energy:
Definition: Énergie mécanique MechanicalEnergy is the sum of kinetic and potential energy in a system.
The formula for mechanical energy is presented as:
Vocabulary: EM = Ep + Ec, where EM is mechanical energy, Ep is potential energy, and Ec is kinetic energy.
This equation is fundamental to the théorème de l'énergie mécanique formule and helps in understanding the conservation de l'énergie mécanique formule.
For potential energy, the formula is given as:
Vocabulary: Ep = m × g × h, where Ep is potential energy, m is mass, g is gravitational acceleration, and h is height.
This formula is essential for calculating the Formule énergie cinétique et potentielle in various physical scenarios.
The page also covers power calculations in electrical systems:
Vocabulary: P = U × I, where P is power, U is voltage, and I is current.
This formula is crucial for understanding the Formule puissance watt and Formule calcul puissance électrique.
Additionally, the page mentions other important physical quantities and their units:
- Weight Poids: P = m × g
- Tension measuredinVolts
- Resistance: R = U / I measuredinOhms
Example: To calculate the kinetic energy of a 2 kg object moving at 5 m/s, use Ec = 1/2 × 2 × 5^2 = 25 Joules.
These formulas provide a solid foundation for students studying physics, particularly in the areas of energy and power. They are essential for solving problems related to Énergie cinétique exemple, variation de l'énergie cinétique formule, and Puissance moyenne physique.
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