chapter 8/9- Physics Flashcards
What is a scalar quantity?
A scalar quantity describes magnitude with no direction.
ex.) you walk 5 kilometers
What is a vector quantity?
A vector quantity describes magnitude and direction.
ex.) you walk 5 kilometers east
What is magnitude?
Magnitude refers to the size of a measurement or the number you’re counting.
What is uniform motion?
Uniform motion is when an object travels in equal displacements in equal time intervals. (When an object doesn’t change speed or direction)
How is uniform motion represented on a position-time graph?
A straight line.
What is distance?
Distance is a scalar quantity that measures the length between two points.
What is position?
Position is a vector quantity that describes an object’s location from a particular viewpoint.
What is displacement?
Displacement is a vector quantity that describes how much an object’s position has changed.
What is speed?
Speed is a scalar quantity that describes the distance on object travels during a given time interval.
What is velocity?
Velocity is a vector quantity that describes how fast an object’s position is changing.
What is average velocity?
Average velocity is the rate of change in position for a time interval.
What is acceleration?
Acceleration is the rate at which an object changes it’s velocity.
What is positive acceleration?
Positive acceleration is when an object’s speed is increasing.
What is negative acceleration?
Negative acceleration is when an object’s speed is decreasing.
What is zero/constant acceleration?
Zero/constant acceleration is when an object’s speed is constant.
