chapter 2 - kinematics Flashcards
what is a scalar quantity?
has magnitude only (no direction)
what is a vector quantity?
has magnitude AND direction
definition of distance
total length travelled by an object irrespective of the direction of motion
definition of displacement
distance travelled by object in a specified direction
definition of speed
rate of change of distance
definition of velocity
rate of change of displacement
definition of average speed
total distance divided by total time taken
definition of average velocity
displacement divided by time
definition of acceleration
rate of change of velocity
3 examples of scalar quantities
[DSA]
distance
speed
average speed
4 examples of vector quantities
[DAVA]
displacement
average velocity
velocity
acceleration
what does the vertical axis on the s-t graph show?
distance
what does the gradient on the s-t graph show?
speed
what does the gradient on the v-t graph show?
acceleration
what does the area under the graph on the v-t graph show?
displacement
what does the vertical axis on the v-t graph show?
velocity
