Energy and Power Calculations
This page presents fundamental physics equations and their applications in energy calculations. The content covers multiple aspects of energy transfer, electrical power, and efficiency calculations essential for physics students.
Definition: Kinetic Energy (KE) is calculated using the formula KE = 0.5 × mass × speed², measured in Joules (J).
Example: For gravitational potential energy calculation, use GPE = mass × height × gravitational field strength (mhg).
Vocabulary: Power (P) represents the rate of energy transfer and is measured in Watts (W).
Highlight: The relationship between power, potential difference, and current is expressed as P = V × I, where V is voltage and I is current.
Definition: Efficiency is calculated as the ratio of useful output energy transfer to total input energy transfer, expressed as: Efficiency = (Useful Output Energy Transfer)/(Total Input Energy Transfer).
The page includes several key energy transferred equations for students, including:
- Power calculations: P = E/t (Energy/Time)
- Charge flow: Q = I × t (Current × Time)
- Energy transfer in electrical systems: E = Q × V (Charge × Voltage)
- Voltage-Current-Resistance relationship: V = I × R
These formulas are essential for understanding energy transfer mechanisms and electrical power calculations in physics.
