scalars and vectors Flashcards
(15 cards)
state the definition of speed
the distance covered per unit time
state the equation used to calculate speed
speed = distance / time
SI unit for speed?
metres per second (m/s)
what is a scalar quantity?
one that only has size
what is a vector quantity?
one that has size and direction
name an example of a scalar quantity
distance, speed or energy
name an example of a vector quantity
displacement, velocity or force
state the definition of distance
the length of the path between two given points
state the definition of velocity
speed in a given direction
state the definition of displacement
how far an object is from its original position or a point of reference in a given direction
state the equation for velocity
velocity = displacement / time
SI unit for mass?
kg
SI unit for weight?
N (newtons)
if a person walks 4m left then 8m right, what is their displacement?
4m right
what is the difference between vectors and scalars?
vectors always have a direction, scalars do not
