Work Energy Power Flashcards
(14 cards)
Work
The force acting on a body times the distance (change in energy)
Unit of work
Joules
Energy
The ability to make things move
Types of kinetic energy
Light Sound Kinetic Thermal Electrical (current)
Potential energy types
Chemical Elastic Nuclear Gravitational Electrical (static)
Kinetic energy
The energy due to an objects mass and speed start with W=🔼Ek and customize
The law of conservation energy
Energy cannot be created nor destroyed but can only change forms or location
The total energy (in a closed system) remains constant
The change in total energy is zero
Power
The rate at which work is done
The rate of change of energy
Efficiency
If we compare the energy (or power) used in doing a task to the energy that actually goes into “useful” work we get efficiency
Equation of efficiency
Energy that goes into “useful” work
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Total energy used
What does C represent
The specific heat capacity
Heat and thermal energy
Thermal energy is the total “internal” energy of a system due to the motion of all the particles. The motion could be in many different “modes”
Temperature definition
Is a measure of the average translational kinetic energy of the particles
Definition of heat
Change in the thermal energy
