chaper 02 - kinematics Flashcards
define displacement
distance travelled in a specified direction
define of distance
total length travelled irrespective of the direction of motion
define speed
distance travelled per unit time
define velocity
rate of change of displacement
formula to find velocity
v = s/t
velocity = displacement/time taken
SI unit of velocity
m/s or ms-1
define acceleration
rate of change of velocity
SI unit of acceleration
m/s2
formula of acceleration
a = v-u/t
acceleration = difference in velocity/difference in time
name 3 scalar quantities
distance
speed
average speed
name 4 vector quantities
displacement
velocity
average velocity
acceleration
++ any other forces (e.g weight)
gradient of velocity time graph
acceleration
area under velocity time graph
displacement
gradient of speed time graph
speed
area under speed time graph
distance
gradient of displacement time graph
velocity
gradient of distance time graph
speed
define terminal velocity
maximum speed attained by an object
what happens when object is at terminal velocity?
acceleration is zero
velocity is constant
