Motion basics
The point in space where the body is located at a certain moment in time
What is position?
distance / time
What is the definition of average speed?
Uniform Rectilinear Motion
What does URM mean?
How do we call a motion with a straight trajectory and a constant velocity?
Uniformly accelerated motion
How do we call a motion with constant acceleration, that is not equal to zero?
UCM
What is the short name of Uniform Circular Motion?
What is the name of motion with constant speed and a circular trajectory?
The path a moving body follows
What is trajectory?
displacement / time
What is the definition of velocity?
This graph is a straight line going up
What is the x-t graph of a URM with positive velocity?
When the final velocity is lower than the initial velocity
When is the acceleration negative?
The time it takes to complete one complete rotation
What is period (T)?
The shortest (straight line) distance between two successive positions
What is displacement?
metre / second (m/s)
What is the S.I. unit of velocity/speed?
This graph is a straight line going down
What is the x-t graph of a URM with negative velocity?
This graph is a straight line going down
What is the v-t graph of a UARM with negative acceleration?
One year
What is the period of the Earth´s motion around the Sun?
The reference point (origin O) and the x-, y- and z-axes
What is a frame of reference?
change in velocity / time
What is average acceleration?
This graph is a straight horizontal line
What is the v-t graph of a URM?
This graph is a curved line, curving up
What is the x-t graph of a UARM with positive acceleration?
The inverse of period (T)
What is frequency (f)?
With three values that we call coordinates
How is the position of a body expressed?
metre / square second (m/s2)
What is the S.I. unit of acceleration?
It is equal to the slope of the x-t graph
What is velocity?
This graph is a straight horizontal line
What is the a-t graph of a UARM?
Hertz (Hz)
What is the S.I. unit of frequency (f)?