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?
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?
A straight line going down.
What is the x-t graph of a URM with negative velocity?
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?
A straight horizontal line.
What is the v-t graph of a URM?
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?
The slope of the x-t graph.
What property of the x-t graph is related to the velocity?
A straight horizontal line.
What is the a-t graph of a UARM?
Hertz (Hz).
What is the S.I. unit of frequency (f)?