Unit 1 - Motion

Question 1

movement of an object, or any of its parts, from one place to another

Answer 1

motion

Question 2

the study of motion and of the forces that affect their motion

Answer 2

mechanics

Question 3

description of the motion of objects without considering causes of motion

Answer 3

kinematics

Question 4

an examination of what causes the motion

Answer 4

dynamics

Question 5

evidence for motion

Answer 5

two objects are in motion if the line segment joining them changes in length or direction or both

Question 6

the physical quantities

Answer 6

time, mass, force

Question 7

two classifications for physical quantities

Answer 7

scalar and vector

Question 8

any physical quantity that can be described by a magnitude and unit

Answer 8

scalar

Question 9

what must you list for scalar quantities

Answer 9

an amount (magnitude) and a unit

Question 10

a measurement that has magnitude, unit and direction

Answer 10

vector

Question 11

the length of the path travelled by an object as it moves from one location to another

Answer 11

distance

Question 12

is distance scalar or vector

Answer 12

scalar

Question 13

shortest distance

Answer 13

position

Question 14

the location of an object relative to a reference point

Answer 14

position

Question 15

is position scalar or vector

Answer 15

vector

Question 16

the change in position of an object

Answer 16

displacement

Question 17

is displacement scalar or vector

Answer 17

vector

Question 18

which physical quantity requires a reference point

Answer 18

position

Question 19

many = _____________

Answer 19

displacements

Question 20

what can the magnitude (amount) of displacement never be

Answer 20

it can never be more than the distance. it can be less than or equal to.

Question 21

where do vectors always go first

Answer 21

south or north

Question 22

how are scalar quantities added

Answer 22

like positive and negative numbers

Question 23

vector quantities that lie along the same line. they can be in the same direction (parallel,) or in the opposite direction (antiparallel)

Answer 23

collinear

Question 24

not parallel. along different angles

Answer 24

non-collinear “tip to tail”

Question 25

the rate at which an object travels

Answer 25

speed

Question 26

total distance for the motion of objects over the total time

Answer 26

average speed

Question 27

speed at a specific time and place

Answer 27

instantaneous speed

Question 28

for objects that travel the same distance every second

Answer 28

constant speed

Question 29

what physical quantity is speed

Answer 29

scalar

Question 30

describes how fast an object is moving and direction

Answer 30

velocity

Question 31

what physical quantity is velocity

Answer 31

vector

Question 32

displacement over time

Answer 32

velocity

Question 33

equal distances in the same direction are being covered in equal time period

Answer 33

constant velocity

Question 34

when an object moves at a constant velocity

Answer 34

uniform motion

Question 35

the instantaneous speed in a specific direction

Answer 35

instantaneous velocity

Question 36

change in position, or the displacement, by the elapsed time

Answer 36

average velocity

Question 37

the rate of change of an object's velocity

Answer 37

acceleration

Question 38

if speed or direction changes, an object is ______________

Answer 38

accelerating

Question 39

changes velocity by equal amounts in equal intervals of time

Answer 39

constant acceleration

Question 40

when velocity changes in a non-uniform way

Answer 40

average acceleration

Question 41

calculating the average acceleration for smaller and smaller intervals of time, and eventually obtaining acceleration at an instant

Answer 41

instantaneous acceleration

Question 42

straight diagonal line on a position time graph

Answer 42

constant velocity

Question 43

horizontal line on a velocity time graph

Answer 43

constant velocity

Question 44

parabola on position time graph

Answer 44

constant acceleration

Question 45

straight diagonal line on velocity time graph

Answer 45

constant acceleration

Question 46

how to find instantaneous velocity

Answer 46

the average velocity for an inter is equal to the instantaneous velocity at the half-time point

Question 47

area under the curve

Answer 47

displacement

Question 48

moving in the same direction, accelerating in the opposite direction, therefore slowing down

Answer 48

negative acceleration