P1: Energy Stores Flashcards
What is a system?
An object or a group of objects
What is the unit for mass when calculating kinetic energy?
Kilograms
What is the unit for extension when calculating elastic potential energy?
Metres
What is the unit for spring constant when calculating elastic potential energy?
Newtons per metre
What are the 2 main types of work done?
Mechanical and electrical
When is work done mechanically and electrically?
Work is done mechanically when a force moves an object, and work is done electrically when a current flows
What are the 5 ways energy can be transferred?
Mechanically, electrically, through infrared radiation, through sound or light waves and through heating
What 2 factors does the amount of kinetic energy an object have depend on?
Speed and mass
What 2 factors does the size of gravity depend on?
The mass and distance
What is the unit for gravitational field strength?
Newtons per kilogram
What is the formula for weight?
W = mg
What is power? What is the formula?
The rate at which energy is transferred. P = E/t
Why would filament lamps be banned?
They are inefficient
