movement and position Flashcards
(25 cards)
definition of speed
the distance travelled each second of the journey
what is the equation for average speed
average speed = distance moved / time taken
what is the symbol equation for average speed
s = d/t
when an object is stationary what will the line look like on a distance-time graph
straight flat line
when an object is travelling faster what would the line look like on a distance-time graph
steep straight line
how is the speed of the student shown in a distance-time graph
gradient
what are displacement and velocity
vector equivalents of distance and speed
what do vectors have
magnitude (size) and direction
what is displacement
straight line distance in a stated direction
what is velocity
speed in a stated direction
what is the velocity equation
velocity = displacement/time taken
what is the symbol equation for velocity
v = s/t
what is different about a displacement-time graph
they can have negative gradient
definition of velocity
the rate of change of velocity
what is the unit if acceleration
m/s^2
what is the equation to calculate acceleration
acceleration = change in velocity/time taken
what is the symbol equation for calculating acceleration
a = v-u/t
how do you calculate the distance travelled using a velocity-time graph
the area beneath the graph
what is the first equation for uniform acceleration
final speed = initial speed + acceleration x time
what is the first symbol equation for uniform acceleration
v = u + at
what is the second equation for uniform acceleration
final velcocitu^2 = initial velocity^2 + 2 x acceleration x distance
what is the second symbol equation for uniform acceleration
v^2 = u^2 + 2as
if the question involves time which equation do you use
the first one
if the question involves distance which equation do you use
the second one
