Forces and motion: Motion Flashcards
what equation is used to calculate average speed?
speed=distance/time
speed= gradient of the line of a distance time graph
On a distance, time graph, what axis is the distance plotted on?
y-axis
On a distance, time graph, what axis is the time plotted on?
x-axis
for a graph of unknown function, how do you determine the instantaneous speed?
the straight line tangent of the curve is drawn at the point in time and the gradient of the tangent is the instantaneous speed.
the steeper the tangent of a distance time graph, the greater the……
speed
what is the equation of average velocity
average velocity = change in displacement / time taken
On a displacement, time graph, what axis is the time plotted on?
x-axis
On a displacement, time graph, what axis is the displacement plotted on?
y-axis
is the gradient of a displacement time graph is negative, what is unique about the velocity?
the velocity is in the opposite direction to the defined positive direction
for a displacement time graph of unknown function, how do you determine the instantaneous velocity?
draw a tangent and work out the straight line velocity at that point.
What is acceleration defined as?
acceleration = change in velocity/time
how do you determine the acceleration on a velocity time graph?
gradient of the graph at a point t
what does the area under a velocity time graph denote
total displacement of the object
in suvat, determine the 5 terms
s
u
v
a
t
s=displacement
u=initial velocity
v=final velocity
a=acceleration
t=time taken
What are the 5 equations of motion
v=u+ at
s=ut+ 1/2at^2
s=vt-1/2at^2
s=1/2(u+v)t
v^2=u^2 + 2as
