Chapter 9 All Sections Flashcards
Motion
a change in position of an object over time
Reference point
the intentional use of one thing to indicate something else
Distance
a scalar quantity that refers to “how much ground an object has covered” during its motion
Displacement
it is the object’s overall change in position.
Vector
a quantity that has both magnitude and direction
Speed
the rate at which an object covers distance
Average speed
the distance traveled divided by the time elapsed
Instantaneous speed
When the speed of an object is constantly changing
Velocity
a vector quantity (it has both magnitude and direction), and is the time rate of change of position (of an object)
Slope
a measure of the steepness of a line, or a section of a line, connecting two points
Acceleration
a vector quantity that is defined as the rate at which an object changes its velocity
Work
calculated by multiplying the force by the amount of movement of an object
Energy
the capacity for doing work
Kinetic energy
the work needed to accelerate a body of a given mass from rest to its stated velocity
Potential energy
the energy that is stored in an object due to its position relative to some zero position
