Pysics- Energy stores, Transferring energy and work done

What is energy conservation??

Energy can’t be created or destroyed; it only changes form or moves between objects.

What are the eight energy stores??

thermal/internal, kinetic, gravitational PE, elastic PE, chemical, magnetic, electrostatic, and nuclear.

What are the four ways energy is transferred??

mechanical (e.g., stretching a spring), electrical (plugging a device in), heating (heat flow from hot to cold), and radiation (light or sound waves).

What is an open and a closed system??

an open system can exchange energy with its surroundings (e.g., a boiling kettle), whereas a closed system does not exchange matter or energy with the outside.

What is work done??

energy transferred

What are the two forms of work done??

• Mechanical work: force acting through a distance (kicking a ball).

• Electrical work: current flowing through a resistance (electric kettle, train brakes turning kinetic energy into heat).