31 terms

# Abeka Physics Chapter 7

This set covers Abeka Physics Chapter 7: "Vectors and Projectile Motion" (pages 94-109).

#### Terms in this set (...)

vector
term for any quantity having both a magnitude and a direction
magnitude, direction
Two vectors are equal if their arrows have the same ______ and the same _____.
parallel
Two vectors that act in the same direction are _____ vectors.
translation
term for moving vectors without rotation
antiparallel
Two vectors that act in opposite directions are ______ vectors.
collinear vectors
term for parallel or antiparallel vectors that act along the same line
perpendicular vectors
term for vectors that act at right angles to each other
skewed vectors
term for vectors that act at angles that are not equal to 0 degrees or multiples of 90 degrees
concurrent vectors
term for two or more vectors that act simultaneously upon the same point
vector diagram
term for a simple picture that summarizes the various vectors acting on one point
resultant
term for a single vector that represents the same effect as the concurrent vectors acting separately
vector composition
term for the process of finding the resultant of two or more concurrent vectors
commutative
Because vector addition is ______, the vectors can be added in any order to give the same resultant.
by adding all three vectors together
How would you find the resultant of three collinear vectors?
Pythagorean method
the best method for finding the vector composition of perpendicular vectors
skewed
The parallelogram method is a good way for adding ____ vectors.
law of sines and law of cosines
the two laws that may be used in the parallelogram method of vector composition
vector resolution
term for the replacement of one skewed vector by two perpendicular vectors that, when acting jointly, have the same net effect as the original vector
component
term for each of the perpendicular vectors in vector resolution
projectile
term for anything hurled through the air or space that is not self-propelled
perpendicular
The influence of gravity is always _____ to an object's horizontal velocity component.
True
True or False: In a vacuum, the downward acceleration is the same for all falling objects, regardless of their horizontal motion or surface area.
magnitude
For objects in free fall motion, the upward velocity and downward velocity are equal in ______ at the same positions, ignoring the effects of air resistance.
counterclockwise
Angles in the ______ position with respect to the positive x-axis are positive.
trajectory
term for the path of a projectile
height
term for the distance a projectile travels vertically
range
term for the distance a projectile travels horizontally
critical velocity
term for the velocity required to obtain an orbit
False
True or False: The critical velocity of different objects differs based on their weights and shapes.
distance from the earth's center and acceleration due to gravity
the two factors that determine the critical velocity of an object
escape velocity
term for the velocity required to burst the bonds of the earth