Physics Flashcards
Speed
Distance travelled divided by time taken (m/s)
Distance
length between two points. Unit is metres (m)
Time
How long it takes to do something (s).
Scalar
A measurement that has size (magnitude) only. They do not have direction associated with them. E.g. distance, speed, time.
Vector
A quantity that has magnitude and direction associated with them. e.g. displacement, velocity
Displacement
is the distance an object travels in a certain direction. E.g. 50 metres North.
Velocity
is the speed of an object in a given direction. E.g. 10 m/s south
Distance-time-graph
Graph drawn using time on x axis and distance on y axis. The slope gives the speed.
Current electricity
A steady flow of charge through wires and circuits
Static electricity
electrical charge collects in one place, and can sometimes jump from one place to another.
Charged particles
Parts of the atom that become negatively or positively charged. E.g. electrons.
Conductors
allow charged particles to move freely e.g. metal
Insulators
Do not allow charged particles to move freely through them e.g. rubber, plastic.
Negative
Something gaining electrons when charged.
Positive
something losing electrons when charged.
