Chapter 6 - Speed , Displacement And Velocity Flashcards
What is the unit of distance ?
Metre ( m)
What is the unit of time ?
Second (s)
What is speed ?
Speed is the rate of change of distance with respect to time
What is the unit of speed?
Metre per second ( m/s)
What is a scalar quantity ?
A quantity that does not have a direction in space associated with it
What is a vector quantity ?
A quantity that has a direction in space associated with it
Words used instead of constant
Steady / uniform
An object moves with a constant speed when ..
Its average speed is always the same
What is displacement ?
Distance in a given direction
What is velocity ?
The rate of change of displacement with respect to time
What is the unit of velocity ?
Metre per second ( m/s)
Explain the term varying velocity
If a moving object does not have constant velocity , it is said to have a varying velocity
Explain briefly how you would measure velocity
Measure the time taken for the object to move a known distance . Divide the distance by the time and the result is its average velocity
What is the slope of the graph ?
The speed of an object
What is a distance time graph for an object moving with constant velocity ?
A straight line
