Chapter 3

Question 1

Quantity with magnitude but no direction

Answer 1

Scalar

Question 2

Vector sum of two or more vectors

Answer 2

Resultant vector

Question 3

Sum of two or more vectors

Answer 3

Resultant

Question 4

Speed in given direction

Answer 4

Velocity

Question 5

Rules that apply to adding vectors together

Answer 5

Vector addition

Question 6

Quantity that has both magnitude and direction

Answer 6

Vector

Question 7

Path of a projectile through the air

Answer 7

Trajectory

Question 8

Start point of a vector; opposite to the head or tip of the arrow

Answer 8

Tail

Question 9

Study of how different observers moving relative to each other measure the same phenomenon

Answer 9

Relativity

Question 10

Maximum horizontal distance that a projectile travels

Answer 10

Range

Question 11

Velocity of an object as observed from a particular reference frame

Answer 11

Relative velocity

Question 12

Motion of an object that is subject only to the acceleration of gravity

Answer 12

Projectile motion

Question 13

Displacement of an object as a function of time

Answer 13

Motion

Question 14

Object that travels through the air and experiences only acceleration due to gravity

Answer 14

Projectile

Question 15

Length or size of a vector; magnitude is a scalar quantity

Answer 15

Magnitude (of a vector)

Question 16

Study of motion without regard to mass or force

Answer 16

Kinematics

Question 17

Method adding vectors in which the tail of each vector is placed at the head of the previous vector

Answer 17

Head-to-tail method

Question 18

End point of a vector; the location of the tip of the vector’s arrowhead ; also referred to as the “tip”

Answer 18

Head (of a vector)

Question 19

Orientation of a vector in space

Answer 19

Direction (of a vector)

Question 20

Piece of a vector that points in either the vertical or the horizontal direction; every 2-d vector can be expressed as a sum of two vertical and horizontal vector components

Answer 20

Component (of a 2-d vector)

Question 21

Refers to the interchangeability of order in a function; vector addition is commutative because the order in which vectors are added together does not affect the final sum

Answer 21

Commutative

Question 22

Study of relative velocities in situations where speeds are less than about 1% of the speed of light - that is, less than 3000 km/s

Answer 22

Classical relativity

Question 23

Method of determining the magnitude and direction of a resultant vector using the Pythagorean theorem and trigonometric identities

Answer 23

Analytical method

Question 24

Frictional force that slows the motion of objects as they travel through the air; when solving basic physics problems, air resistance is assumed to be zero

Answer 24

Air resistance