31 terms

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

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