P2.1.4 - Distance-Time Graphs Flashcards
What does a graph of distance against time tell you?
The speed of an object on its journey
What is the speed equal to on the diagram?
The gradient
What does a straight line on a graph mean?
The speed is constant
What does a horizontal line on a graph mean?
The object is not moving
What does a steep line mean on a graph?
The object is moving quickly
How do you calculate speed from a distance-time graph?
You draw a triangle under the line, and use it to calculate the change in distance and the change in time. Then you use the equation for speed
What is the difference between a distance-time graph and a displacement-time graph?
The gradient can be positive, zero or negative in a displacement-time graph
How do you calculate velocity from a graph?
You draw a right-angled triangle from 2 points to each other, and calculate the change in displacement and change in time. Then you use the equation to calculate velocity
