Graphs Flashcards
What is the definition of velocity?
Velocity is speed in a given direction.
What is the equation that links speed, time and distance?
speed= distance/time
On distance-time graphs, what does the gradient of the line show?
It shows how fast the object is going.
If there is a flat horizontal line on a distance-time graph, what does it represent?
It represents the object being stationary.
True or False. A straight line at any gradient on a distance-time graph (other than horizontal!) represents a constant, steady speed?
True
What shape of line would you expect to see on a distance-time graph if the object is accelerating or decelerating?
A curve
How do you work out a speed from a distance-time graph?
speed=gradient=up/across
What unit is used for speed and velocity?
m/s
What is the definition of acceleration?
Acceleration is the change in velocity (m/s) per second (s) measured in m/s2
What is the formula for calculating acceleration?
In a velocity-time graph, what does the gradient represent?
Acceleration
Fill in the blanks for a velocity-time graph.
The steeper the ______ the greater the ______ or ______.
True or false? In velocity-time graphs, uphill sections (/) are acceleration, downhill sections () are deceleration.
How do you work out the distance travelled over a certain period of time on a velocity-time graph?
The area under any section of the graph is equal to the distance travelled in that time interval.
How do you work out acceleration from a velocity-time graph?
acceleration = gradient = up/accross
