Topic 2: Energy Flashcards
What is Work Done
when a force moves a distance
What is a joule
The work done when a force of 1N moves a distance of 1m in the direction of the force
Equation for Work done
Work Done = Force x Distance
What is energy defined as
the ability to do work
Principle of Conservation of Energy states
Energy cannot be created or destroyed but can be changed from one type to another
In addition Principle of conservation of energy reinforces
Energy cannot be made
Energy can change form
What is GPE
Gravitation potential energy is energy store due to position of a mass
Equation of GPE
GPE = m x g x h
What is Kinetic Energy
Energy of a moving mass
Kinetic energy is calculated using
KE = 1/2 x m x v²
What is Power
The rate of doing work
Equation for Power
Power = work done / time
Power is measured in
Watts
A watt is
One Joule per second
Efficiency is
A way of describing how good a device is at transferring energy from one form to another in an intended way
