P2 1 Motion Flashcards
How is a stationary object represented in a distance-time graph?
A horizontal, straight line
How is an object moving at a constant speed shown on a distance-time graph?
A straight line that slopes upwards
What does the gradient of a line in a distance-time graph represent?
The speed
If the gradient of the line in a distance-time graph is steeper what does it show?
The speed is greater
What is the equation for speed?
Speed = distance/time
What goes on the x-axis and what goes on the y-axis on a distance-time graph?
x - time
y - distance
What does the term velocity mean?
Speed in a given direction
An object moving steadily round in a circle has a constant speed but why not a constant velocity?
The direction keeps changing
What is meant by the term acceleration?
The change of velocity per second.
What is the scientific unit for speed?
m/s
What is the scientific unit for acceleration?
m/s2
What is the equation for calculating acceleration?
acceleration = change in velocity in m/s / time taken for the change in s
Change in velocity is final velocity - initial velocity
a= v-u / t
What term is used when an object decelerates?
Deceleration or negative acceleration
What does a line sloping upwards show?
Acceleration
What does a straight line sloping upwards show?
Constant acceleration
