Motion1
(two words) A simplified motion diagram in which the object is replaced with a single point.
What is the PARTICLE MODEL?
The rate of motion; a scalar that tells how fast but not which way.
What is SPEED?
When two lines on a position-time graph _____, the objects are in the same place at the same time.
What is INTERSECT?
The instrument in a car that shows instantaneous speed.
What is a SPEEDOMETER?
The point at which both variables in a coordinate system have the value zero.
What is ORIGIN?
A scalar that tells how far an object traveled; a car's odometer can show 5 mi of it even when the displacement is 0 mi.
What is DISTANCE?
_____ velocity is the speed and direction of an object at one particular instant.
What is INSTANTANEOUS?
(two words) The difference between two times: Δt = tf − ti.
What is TIME INTERVAL?
A vector that represents the sum of two other vectors.
What is RESULTANT?
A quantity that has both magnitude and direction; it can be represented by an arrow.
What is a VECTOR?
Speed together with a direction; the rate of change of an object's position.
What is VELOCITY?
_____ velocity is Δx / Δt, the slope of a position-time graph.
What is AVERAGE?
On a position-time graph, time is always plotted on the _____ axis.
What is HORIZONTAL?
(three words) A coordinate system for specifying the precise location of objects in space.
What is a FRAME OF REFERENCE?
A vector that represents the sum of two or more other vectors.
What is a RESULTANT?
In the equation x = vt + xi, xi stands for the _____ position (the y-intercept).
What is INITIAL?
A change in position: Δx = xf − xi.
What is DISPLACEMENT?
The Greek letter (Δ) used to represent a change in a quantity.
What is DELTA?
The distance and direction from the origin to an object (symbol x).
What is POSITION?
A change in position that has both magnitude and direction.
What is DISPLACEMENT?
Another word for the size of a quantity.
What is MAGNITUDE?
(two words) A series of images showing the positions of a moving object at equal time intervals.
What is a MOTION DIAGRAM?
A quantity that is just a number and a unit, with no direction, such as time or mass.
What is SCALAR?
On a position-time graph, the _____ of the line equals the average velocity.
What is SLOPE?
The average speed of an object is ____ its average velocity.
What is the ABSOLUTE VALUE OF?