Movement and Position Flashcards
(20 cards)
What is displacement?
the distance an object moves in a straight line from a starting point to a finishing point
What is a vector quantity? Give two examples
A vector quantity contains a magnitude (size) and direction. Displacement and velocity are vector quantities
What is distance?
How far an object moves.
What is a scalar quantity? Give two examples.
A quantity that contains magnitude (size) but not direction. Distance and speed are scalar quantities.
What is velocity?
Velocity describes an object’s direction as well as its speed.
What are the units for velocity and speed?
m/s
How is constant movement shown on a distance-time graph?
By a straight line
What does a horizontal line mean on a distance-time graph?
The object is stationary
If an object moves faster, the _______ becomes steeper.
Gradient
What axis is time on?
x
What does a horizontal line mean on a velocity/speed-time graph?
If the object’s speed is constant
What does a line along the x axis mean on a velocity/speed-time graph?
The object is not moving
What does a positive gradient mean on a velocity/speed-time graph?
If the speed of an object increases with time.
What does a straight line mean on a velocity/speed-time graph?
Acceleration/deceleration is constant
What does a curved line mean on a velocity/speed-time graph?
Acceleration/deceleration is not constant
What is acceleration and its unit?
Its change in speed-m/s²
What is the area under a velocity/speed time graph?
The total distance travelled by an object
What is average speed?
The total distance travelled divided by the total time taken
What are light gates?
Light gates record how long it takes for an object to pass through them
What is the equation linking velocity, acceleration and time?
final velocity = initial velocity+accelerationxtime (v=u+at)
