3.1 Motion Flashcards
What is the definition of speed?
The rate of change of distance.
What is the definition of displacement?
A change in position in a particular direction.
What is the definition of distance?
How far an object has travelled.
What is the equation for speed?
Speed = distance/time (s=d/t)
What is the definition of velocity?
The rate of change of displacement.
What is the equation for velocity?
Velocity = displacement / time (v=d/t)
What is the equation for acceleration?
Acceleration = change in velocity / change in time (a=Δv/Δt).
What is the first suvat equation?
v=u+at
What is the second suvat equation?
s=½(u+v)t
What is the third suvat equation?
s=ut+½at²
What is the fourth suvat equation?
v²=u²+2as
How is stopping distance calculated?
Stopping distance = thinking distance + braking distance.
How is thinking distance calculated?
Thinking distance = speed x reaction time.
How is braking distance calculated?
Velocity squared / acceleration.
What is thinking distance proportional to?
Speed.
What is braking distance proportional to?
Speed squared.
What does a displacement-time graph show?
How the displacement of a moving object varies with time.
What is the gradient of a displacement time graph equal to?
The instantaneous velocity of the moving object.
What does the area beneath a velocity time graph represent?
The change of the displacement.
