P1: Conservation And Dissipation Of Energy Flashcards
What is energy?
Energy is the ability to do work
What does energy mean?
Energy means it allows matter to move or cause change. Energy makes things happen
What are the types of energy?
- light
- electic
- sound
- magnetic
-kinetic
What are the 10 different forms of energy?
- magnetic
- kinetic
- heat/thermal
- light
- sound
- gravitational potential
- chemical potential
- elastic potential
- electrical
- nuclear
Define store?
Something (or quantity) kept fir use when needed
What is kinetic energy?
A moving object
What is chemical energy?
A fuel or battery
What is gravitational energy?
An object above ground
What is elastic/stain energy?
A stretched or squashed object
What is thermal energy?
Due to a substance temperature
What is magnetic energy?
2 seperated magnets (attract/repel)
What is nuclear energy?
Radioactive decay
What are the four pathways of energy being transferred?
- mechanically
- electrically
- by heating
- by radiation (waves)
What is mechanically?
When a force acts and something moves
What is electrically?
When a current flows
What is by heating?
Because of a temperature difference
What is by radiation (waves)
A wave such as light microwaves or sound
What is an example of an object falling?
When an object falls its speeds up, increasing its kinetic energy store and decreasing its gravitational potential energy store
Define work?
To move an object with an applied force
What is the equation for work done?
W = F x s
Work (J) = Force (N) x Distance (m)
What is the equation for kinetic energy?
Ek = ½ x m x v (2)
