Unit 1 Flashcards
(25 cards)
acceleration
the rate at which the velocity changes with respect to a change in time
acceleration due to gravity
g: 32 ft/s2 or 9.80 m/s2 on the earth’s surface
average speed
the total distance traveled divided by the total time traveled
average velocity
the total displacement divided by the total time
component
the vertical and horizontal vectors which add together geometrically to become the resultant
derived units
units calculated by multiplication or division from measurements in base units
demensional analysis
a mathematical problem-solving method that utilizes conversion factors
displacement
the shortest distance between an initial and final position and the direction along that line; a vector quantity
distance
the change in position from one location to another.
field
a region in space that yields a value for a measurable quantity at every point
kinematics
a branch of mechanics dealing with the mathematical methods of describing motion without regard to what causes that motion
mass
the quantity of matter that a body possesses
model
a mental construct that describes a physical phenomenon
motion
a continuous change of position
precision
the degree of exactness of a measurement, described by the number of significant digits used to express the value
projectile
object thrown or launched in the air and subject to gravity
projectile motion
the motion of objects moving in two dimensions under the influence of gravity
resultant
the geometric sum of two or more vectors.
scalar
a physical quantity expressed as a magnitude and a unit
scientific notation
number expressed as powers of ten
speed
the rate at which distance changes with respect to time; a scalar quantity
time
that which allows us to place events in the order in which they occur
vector
a physical quantity that is expressed as a scalar and a direction
velocity
the rate at which displacement changes with respect to time; a vector quantity
