concepts
What is a reference frame?
It's a point, and the axis neccesary for studying motion
What is the distance travelled?
It's the change of position along the path
What is acceleration?
It is the variation of speed divided by the time taken
What is the shape of the graph s-t in a uniform and rectilinear motion
A straight line
If the graph v-t is horizontal, the mobile...
Moves at a constant speed
What does it mean that motion is relative?
It means that we can talk about it, or not, depending of the reference frame
What is the displacement?
It's the difference between final and initial position
If the movement is uniform, acceleration is...
Null
If the graph s-t is horizontal, the object...
...is still
If the graph v-t has a positive slope, it represents...
that speed is rising
Uniform circular motion is always....
Accelerated.
What does an odometer measure?
Distance travelled.
If final speed is greater than initial speed, acceleration is
Greater than 0
The slope of the graph s-t represents...
The speed of the movement
If the graph v-t has a negative slope, it represents...
That speed is reducing
What is a rectilinear motion?
It's whe the path is a straight line
If path is a straight line and speed is constant the movement is called...
Rectilinear and uniform motion
If speed drops, acceleration is...
Negative
If the slope of the graph s-t is negative, the object...
moves to the initial position
What represents the slope of the graph v-t?
Acceleration
Average speed=
Total distance/ total time
What's instantaneous speed?
It's the speed at at certain moment
The unit of acceleration in SI is...
m/s2
If A moves faster than B, the slope of its graph s-t is...
Greater
If acceleration is null, the graph v-t is...
Horizontal