Describing motion along a line Flashcards
What is distance?
How far an object moves
Is distance a scalar or vector quantity?
Scalar
Does distance involve a direction?
No
Define displacement
Displacement includes both the distance an object moves, measured in a straight line from the start point to the finish point and the direction of that straight line
Is displacement a scalar or vector quantity?
Vector
Does speed involve a direction
No
Is speed a scalar or vector quantity?
Scalar
What factors affect the speed at which someone walks?
- Age
- Terrain
- Fitness
- Distance Travelled
What is the average speed of sound moving through air?
330 m/s
How do you calculate distance?
Distance travelled = speed × time
What are the units of distance?
Metres (m)
What are the units of speed?
Metres per second (m/s)
What are the units of time?
Seconds (s)
What is the velocity of an object?
Its speed in a given direction
Is velocity a scalar or vector quantity?
Vector
What does a distance-time graph represent?
The amount of distance covered by an object travelling in a straight line over a period of time.
What does the gradient of a distance-time graph tell you?
The speed of the moving object
How can you calculate acceleration?
Acceleration = change in velocity / time taken
What are the units of acceleration?
Metres per second squared (ms^2)
What are the units for velocity?
Meters per second (m/s)
What keyword describes an object slowing down?
Decelerating (Negative acceleration)
How can you calculate acceleration from a velocity-time graph?
Work out the gradient of the line.
