1 Motion Flashcards
What is the distance time graph for any object which is stationary?
a horizontal line
What is the distance time graph for any object which is moving at a constant speed?
a straight line which slopes upwards
What does the gradient of a distance time graph represent for an object?
its speed
How do we calculate speed?
speed (m/s) = distance travelled (m)
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time taken (s)
What is the speed triangle which allows us to rearrange the formula of speed?
distance
—————————————–
speed I time
What is velocity?
a speed in a given direction
How can two moving objects have the same speed but different velocities?
they are moving in opposite directions
What is acceleration?
is the change of velocity per second measured in m/s2
How do we know something is accelerating?
when there is an object with a changing velocity
How do we calculate acceleration?
Acceleration (m/s2) = change in velocity (m/s)
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time taken for change (s)
to work out change in velocity you do final velocity - initial velocity
What is deceleration?
the change of velocity per second when an object slows down (negative acceleration)
What does the gradient of a line measure of a velocity time graph?
acceleration
What does it mean if a velocity time graph is a horizontal line?
the acceleration is 0
What does the area underneath a velocity time graph represent?
the distance travelled
How is a constant velocity represented on a velocity time graph?
a horizontal line
