Topic 9 - Motion Flashcards
What is acceleration?
The change of velocity per second.
What is acceleration measured in?
Metres per second squared (m/s2).
What is displacement?
A distance in a given direction.
What is displacement measured in?
Metres/Kilometres in a cardinal direction.
What is gradient?
Change in the quantity plotted on the x-axis divided by the change in the quantity on the y axis. If the x axis is seconds elapsed and the y axis is metres travelled, gradient will be measured in metres per second.
What is tangent?
A straight line drawn on a point on a curved line so that it has the same gradient as the curve at that point.
What is velocity?
Speed in a given direction. This is measured in m/s.
What is the equation relating speed, distance and time?
Speed (m/s) = distance (m) / time (s)
What is a distance-time graph?
A graph comparing distance over time.
What is average speed?
Total distance / time
What is instantaneous speed?
Speed at a given position.
What can be said about an object moving at a constant speed but turning?
The object is accelerating.
What is deceleration?
An decrease in velocity over time.
What is the equation linking initial and end velocity, acceleration and displacement?
Final velocity squared = initial velocity squared + 2x ( acceleration x displacement). V2 = U2 + 2as
How do you calculate gradient?
Change in Y / Change in X
