physics units/defenitions Flashcards
Time (unit)
seconds, s
Velocity (unit)
metres per second, m/s, ms^-1
Temperature (unit)
degrees celsius, ‘c
Energy (unit)
Joules, J
Force (unit)
Newtons, N
the length of the actual path between the inital and final position of a moving object in the given time interval is known as the _________ travelled by the object.
distance
_________ is an objects change in position, only measuring from its starting position to the final position.
displacement
____________ is the distance travelled per unit of time.
speed
_________ is the vector quantity that indicates distance per time and direction
velocity
__________ is usually said to be a physical quantity that only has magnitude and no other characteristic
scalar
__________ is a quantity that has both magnitude and a direction
vector
magnitude
distance or quantity
energy of an object due to its motion
kinetic energy (Ek)
gravitational potential energy (Egp)
energy of an object due to its position in a gravitational field.
energy stored when an object is stretched or compressed
elastic energy (Eelast)
chemical potential energy
energy stored in chemical bonds (Ech)
energy contained in an object due to temperature
thermal energy (Eth)
potential energy
energy stored away
active energy
energy in use
work (energy transfer)
when a force moves an object through a distance
heating (Eh or Q)
energy transfer
when energy flows from hot to cold objects, not to be confused with thermal energy
electricity (Eelect)
energy transfer
when energy is transferred by an electric current
waves
energy transfer
by sound or electromagnetic radiation
