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25 Cards in this Set
- Front
- Back
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What does a scalar quantity describe? Does it include direction?
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A scalar quantity describes the size of a measurement and is called the magnitude. It does NOT include direction.
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What two things does a vector quantity describe?
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A vector quantity describe the measurement/magnitude AND the direction(East, West,North,South).
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What symbol is used when showing a vector quantity?
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The symbol used for vector quantities is an arrow pointing to the right that is shown above the measurement symbol.
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What measurements are used in scalar and vector quantities?
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"m" for metres and "km" for kilometres
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What directions for scalar quantities are positive? What ones are negative?
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Directions for a positive quantity are: north, east, up, and right.
Directions for a negative quantity are: south, west, down and left. |
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What does an object in UNIFORM MOTION mean?
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An object in uniform motion travels EQUAL displacements in EQUAL time intervals.
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What does a position-time graph show?
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A position-time graph shows an object's POSITION changes over time. Its position is where exactly it is at a certain time.
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What is a best-fit line? When is it used?
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A best-fit line is a line that shows a smooth curve or straight line the most closely fits the general shape outlined by the points to show the real motion of an object/person.
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What does the SLOPE of a position-time graph tell you?
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The slope tells you if the object is going in a positive (north, east, up, and right) and a negative direction (south, west, down, and left) and also zero (at REST/not moving).
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Describe what a positive slope on a position-time graph looks like?
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A positive slope slopes UP to the right.
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Describe what a negative slope on a position-time graph looks like?
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A negative slope slopes DOWN to the right.
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What does a ZERO slope line on a position-time graph look like?
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A zero-slope looks like a straight, horizontal line.
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What is a reference point?
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A reference point is a point in space from which a change is measured.
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What is the equation to find the difference in time?
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change in (triangle) T = Ti - Tf
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If an object is not moving what type of line would you see on a position-time graph?
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A horizontal line. _________________
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What term is used to describe "the total length of a path between two points"?
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The distance.
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What term is used to describe "a specific point or location relative to a reference point"?
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The position.
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What term is used to describe "the difference between the initial time and the final time"?
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The time interval.
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What is velocity? Is it a vector or scalar quantity?
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Velocity is how quickly an object's position changes and includes a vector quantity with a direction.
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What is "speed"? Is it a vector or scalar quantity?
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Speed is a scalar quantity that measures only the magnitude of the velocity.
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What equation is used to find out the velocity of an object?
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velocity = change in distance OR slope = rise over run
_____________________ change in time |
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What equation is used to find out the AVERAGE VELOCITY?
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Average Velocity = change in distance
_____________________ change in time |
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On a position time graph an object moving away from its origin (starting point) up to the right would have a:
a) negative slope b) zero slope c) positive slope |
c) positive slope
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On a position-time graph when you see a horizontal line like this ________________, how is its motion described?
a) moving to the left b) moving to the right c) at rest |
c) at rest
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How is speed measured or what units are used?
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Metres per second or m/s
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