topic 2 Flashcards
what is distance
a scalar quantity (has size but no direction) that measure the amount travelled between 2 places
what is displacement
a vector quantity (has size and direction) which measures the shortest distance between 2 places travelled
what is speed
how fast an object is travelling, a scalar quantity, rate of change of distance
how is speed calculated
distance ÷ time
what is speed measured in
m/s, km/h
what is velocity
rate of change of displacement, the speed of an object in a particular direction
how is velocity calculated
displacement ÷ time
what is acceleration
the rate at which velocity changes, vector quantity
types of acceleration
increase in speed, decrease in speed and change in direction
what is the acceleration of an object due to gravity (g)
9.8m/s²
