Energy and Work Done Flashcards
Energy is never ___ or ___; only ___
Created or destroyed; only transferred (between different forms and objects)
How can energy be transferred between energy stores? [4]
Mechanically, by heating, by radiation, or electrically.
What is an open system?
A system that can interact with the outside world; can gain or lose energy to the outside world.
What is a closed system?
A system that is separate to the outside world. No energy or mass is lost to the outside world; overall energy change is always zero.
What is work done?
Work done is the measure of energy transfer when a force moves an object through a distance.
What are the two main types of work done?
Mechanical and Electrical.
What is the equation for work done? (with units)
Work done (J) = Force (N) x Distance moved (m)
