Chapter 3 Motion Flashcards
average speed equation?
distance travelled / time taken
what is the gradient of a distance time graph?
speed of the object
what is instantaneous speed?
the speed of a car in a very short interval of time.
Are Displacement and Distance both vector quantites?
Displacement is vector but Distance is scalar
Average velocity equation?
change in displacement / time taken
How do u determine the velocity of a displacement time graph?
it is the gradient of the displacement time graph but if it is not a straight line draw a tangent.
What is acceleration?
the rate and change of velocity
what is the unit of acceleration?
ms^-2
how do you calculate acceleration?
Velocity / time taken
what is the gradient of a velocity time graph?
acceleration
what is the area under an velocity time graph?
displacement
what are the equations of motion?
v=u+at
s=ut + 1/2at^2
v^2=u^2+2as
s=1/2(u+v)t
what is stopping distance?
the total distance travelled when a driver sees a reason to stop, to when the vehicle stops
what is thinking distance?
distance travelled when u first see a reason to stop, to when u hit the brake.
what is braking distance?
distance travelled when u first hit the brake to when the vehicle stops
