Paper 1 Flashcards
can energy be created or destroyed
no
what are the different energy stores
thermal
kinetic
gravitational potential
elastic
chemical
magnetic
nuclear
electrostatic
how can energy be transferred
mechanically
electrically
heating
radiation
what is a system
an object or a group of objects
what is an open system
when a group of objects can interact with the outside world meaning energy can be lost or gained
what is a closed system
no energy can leave or enter surroundings meaning the total energy in a closed system never changes
what are the 2 main types of work done
Mechanical and electrical
what is mechanical work done
the using of a force in order to move an object
what is electrical work done
this is when current flows, energy that is required to overcome resistance in the wires
what is kinetic energy
the energy an object possesses due to its motion
what 2 things determine how much KE an object has
speed and mass
how does speed effect KE
the more speed the higher the KE
how does mass affect KE
if everything else remains the same an increase in mass will lead to the increase in the amount of KE
what is gravity
the force of attraction between 2 objects
what 2 factors affect the gravitational force of attraction
mass
how far apart the objects are
what is a gravitational field
the field of influence around an object