P1: Conservation And Dissipation Flashcards
What is energy?
Energy is the ability to work
What are the 8 different energy stores?
Chemical, Kinetic, Gravitational Potential, Thermal, Elastic Potential, Magnetic, Electrostatic, Nuclear.
What is the energy of a moving object?
Kinetic energy
What is the conservation of energy?
Energy cannot be created or destroyed, it can only be transferred
What energy is lost when a ball hits the ground?
Thermal energy
What is the definition of work?
Work is the amount of energy transferred when a force moves
What is the equation that links force, distance and work done?
Work done = force X distance
What is kinetic energy?
The energy an object has due to its mass and velocity
What does every spring have?
A spring constant
What is wasted energy?
The energy that is not needed
e.g the light created by an oven
What is useful energy?
The energy that is needed
e.g The heat from an oven
When is an object efficient?
If it uses more energy than it wastes
What is power?
The amount of energy transferred/work done per an amount of time
Power = work done / time taken
