physics test
a time interval is the ___________ between two times
difference
a position time graph is created for the motion of an object. the positive direction is north. on the position time graph, the slope is a ________ value, which means the velocity of the object is moving south.
negative
for linear value, velocity can be a ________ value while speed cannot
negative
The _____________ _________ is a simplified version of a motion diagram in which the moving object is replaced with a series of single points
particle model
on a motion diagram describing the movement of an object, the average velocity will always be the same as the ____________
displacement
the ___________ of a vector is a measure of the size of the vector
magnitude
Why do different equivalent representations of motion, such as data tables, motion diagrams and position time graphs exist?
Some types of representations are more useful than others, depending on what information you have
average speed is the distance traveled divided by the time taken to travel that distance; for uniform motion, it is the ___________ ______of the slope of the objects position time graph
absolute value
what is meant by the term straigt line in motion
a path taken between two points without turning left or right
scalar quantity
a quantity that can be described by magnitude only and has no direction
vector quantity
a quantity that has both magnitude and direction
which properties of an object are ignored in the particle model of the object?
all internal motions movement of arms movement of legs
the motion of an object from a position time graph is modeled using an equation of the form y=mx+b. in this form, the value of _ represents the position at 0 s
b
A series of images showing the position of a moving object against a stationary background is called ______________________
consecutive images
a time interval is the ____________ between two times
difference
a coordinate system is a system to describe motion that gives the zero point location of the variable being studied and the _________ in which the values of the variables increase
direction
a scalar quantity ,like temperature or distance, is just a number without any ___________
direction
on a motion diagram describing the movement of an objects, the averagee velocity will always be in the same direction as the ___________
displacement
what measurements can be used to develop a coordinate system to describe the motion of an object
distance and time
is it important that images in motion diagrams be taken at _____ intervals of time
equal
it is important that images in motion diagrams can be taken at ______ intervals of time
equal
a position time graph is a graph that can be used to determine an objects velocity and position made by plotting the time data on the ___________ axis and positioning data on the __________ axis
horizontal, vertical
how are motion diagrams created
images of an object are taken at equal time intervals, with the background in the same position in all images
______________ position is the position of an object at any particular instant in time
instantaneous
Motion Diagrams show multiple images of a _______ object against motionless objects in the background
moving
a change in _______ in an indication that an objects in motion
position
a change in ________ is an indication that an object is in motion
position
displacement is a change in ________ having both magnitude and direction. it is equal to the final position minus the initial position
position
instantaneous position is the ________ of an object at any particular instant in time.
position
quanity represented on y axis
position
when an object is in motion, it experiences change in __________
position
ina series of consectuive images of a runner against the background of the park, the only thing that should change in each image is the
position of the runner
information from motion diagrams organize the times and corresponding positions of moving objects into a chart that is referred to as a ___________________ chart
position-time
the magnitude of a vector is a measure of a ____ of the vector
size
to use a particle model, the objects ___________ must be much less than the distance it moves
size
if an object moves in a straight line direction that is northward, the only other direction that it can move is _______
south
average __________ is the distance travelled divided by the time taken to travel that distance; for uniform motion, it is the absolute value of the slope of the objects position time graph
speed
a position time graph allows for the displacement of an object to be found. which statements are correct with respect to how this can be done from the graph
subtract the final position from the initial position
when the motion of an object generates a straight sloping line on a position time graph an equation of the form y=mx+b can be used to describe the motion. In this form, what does the value of m represent
the displacement of the object
on a motion diagram of two objects moving at constant speeds, which is correct
the distance between two points will be larger for the faster moving objects
which statement best describes the meaning of tww intersecting lines on a position-time graph
the two objects have the same position at that point in time
quanity represented on the x axis
time
When the slope of a position time graph is calculated the, the result gies the ________ of the object represented in the graph
velocity
a scientist has started recording the position of objects along a linear path. she decides that all positions that are to the east will be in the positive direction. any positions that are to the ____ will be recorded as negative
west
