Chap 1 - Concepts of Motion

Question 1

The location of an object in relation to some “reference point”

Answer 1

Position

Question 2

The symbol for time

Answer 2

t

Question 3

In linear motion, the “+” and the “-“ symbols are used to show what?

Answer 3

Direction

Question 4

Acceleration

Answer 4

That rate at which you change your velocity.

Example:

Every second, he was going 5mph faster than the second before.

Question 5

A quantity that has both magnitude and direction.

Example:

Forces are vectors because if you push or pull on something, there is a magnitude (size) of your push, and there is always a direction of your push.

Answer 5

Vector

Question 6

Velocity at clock reading = t

Answer 6

^{<span>v</span>}_t

Question 7

A point or exact location that can be used to help describe the location of some other point or object.

Answer 7

Reference Point

Question 8

Constant Speed

Answer 8

Not speeding up or slowing down

Question 9

A letter written smaller and below the rest of the writing.

^{<span>v</span>}_t

Here the “ t “ is subscripted

Answer 9

Subscript

Question 10

Another way of saying that someone is accelerating in such a fashion that each second they were going 7 meters per second faster than the second before?

Answer 10

Acceleration = (7 m/s) / s

or

7m/s²

Question 11

In motion along a line, what is the difference between the following two “velocities?”

17 m/s

-17 m/s

Answer 11

The objects are traveling at the same speed, but in opposite directions.

In linear motion, we can use plus and minus to represent different directions.

Question 12

Reference Point

Answer 12

A point or exact location that can be used to help describe the location of some other point or object.

Question 13

This is called a

Answer 13

Motion Diagram

(aka Motion Map)

Question 14

Scaler

Answer 14

A quantity that has a magnitude (size) but no direction.

Examples:

Temperature. 78 degrees tells you how “big” the temperature is, but there is no direction to 78 degrees.

Question 15

In order to describe the position of an object, you must always refer to a ___________ _____________.

Answer 15

Reference Point

(or reference object)

Question 16

Speed

Answer 16

How fast an object is traveling.

(Direction is not important)

Question 17

Average Speed

Answer 17

A single speed that can be used to represent an object’s speed during a period of time, even if the object is changing speeds.

Question 18

Is velocity a vector or a scaler?

Answer 18

Velocity is a vector.

It has both magnitude (size) AND direction.

Example:

Her velocity was 30 mph north.

Question 19

Which object is moving faster?

A car going +10 mph

A moped going - 10 mph

Answer 19

Neither.

They are both going the same speed, but in different directions.

Question 20

^{<span>x</span>}0

Answer 20

Position at clock reading = zero

Question 21

x

Answer 21

the symbol for position

(X marks the spot)

Question 22

Velocity/Time graph

Answer 22

A motion graph with time on the horizontal axis and velocity on the vertical axis.

Question 23

a

Answer 23

The symbol for acceleration

Question 24

Vector

Answer 24

A quantity that has both magnitude and direction.

Example:

Forces are vectors because if you push or pull on something, there is a magnitude (size) of your push, and there is always a direction of your push.

Question 25

Position at clock reading = "t"

Answer 25

*^x_t*

Question 26

*^v_t*

Answer 26

Velocity at clock reading = t

Question 27

the symbol for distance

Answer 27

*d*

Question 28

Displacement

Answer 28

How far you are from where you started, and in what direction.

Question 29

How big something is.

Answer 29

Magnitude

Question 30

That rate at which you change your velocity. Example: Every second, he was going 5mph faster than the second before.

Answer 30

Acceleration

Question 31

The symbol for acceleration

Answer 31

*a*

Question 32

Velocity

Answer 32

The speed and direction an object is travelling.

Question 33

How fast an object is going at an instant in time. It is what is shown on the speedometer of a car.

Answer 33

Instantaneous Speed

Question 34

*^v₀*

Answer 34

Velocity at clock reading = zero

Question 35

Velocity at clock reading = zero

Answer 35

*^v₀*

Question 36

Which object is moving the fastest?

Answer 36

A The steepest line on a position/time graph represent the fastest moving object. (A is moving the opposite direction from B and D)

Question 37

In linear motion, how will we show the direction an object is travelling?

Answer 37

With a "+" sign or a "-" sign. The plus would mean one direction, and the minus would mean in the exact opposite direction.

Question 38

Is "speed" a scaler or a vector?

Answer 38

It is a scaler. Speed has a magnitude (size) but no direction. Example: 50 mph.

Question 39

Which object is not moving?

Answer 39

C

Question 40

Look carefully at the following graph. Does this show and object that is moving or standing still.

Answer 40

This shows an object that is moving at a very steady speed. [![]()](http://s3.amazonaws.com/brainscape-prod/system/cm/002/046/089/q_image_card.png?1347224568) (Make sure you understand why)

Question 41

Linear Motion

Answer 41

Motion along a line

Question 42

A quantity that has a magnitude (size) but no direction. Examples: Temperature. 78 degrees tells you how "big" the temperature is, but there is no direction to 78 degrees.

Answer 42

Scaler

Question 43

Magnitude

Answer 43

How big something is.

Question 44

Subscript

Answer 44

A letter written smaller and below the rest of the writing. *^v_t* Here the " *t* " is subscripted

Question 45

*d*

Answer 45

the symbol for distance

Question 46

If you say a ball is 30 feet up, what would typically be your reference point.

Answer 46

The ground below the ball. (The ball would be 30 feet away from the reference point or ground in this case)

Question 47

the symbol for velocity

Answer 47

*v*

Question 48

acceleration / time graph

Answer 48

A motion graph with time on the horizontal axis and acceleration on the vertical axis.

Question 49

In linear motion, the difference between -55 mph and +55 mph is?

Answer 49

Direction only

Question 50

When you describe the velocity of a car, your typical reference object would be what?

Answer 50

The surface of the road beneath the car.

Question 51

*v*

Answer 51

the symbol for velocity

Question 52

The study of motion

Answer 52

Kinematics

Question 53

When they describe the "top velocity" of a type of airplane, the reference object they would typically use would be what?

Answer 53

The air the plane is flying in.

Question 54

acceleration / time graph

Answer 54

A motion graph with time on the horizontal axis and acceleration on the vertical axis.

Question 55

Motion

Answer 55

A change in an objects postion over some time interval.

Question 56

translational motion

Answer 56

motion where an object travels from one place to another.

Question 57

Trajectory

Answer 57

The path along which an object moves.

Question 58

Particle

Answer 58

An object that can be represented as a mass at a single point in space.

Question 59

Particle Model of Motion

Answer 59

A simplification in which we treat a moving object as if all of its mass were concentrated at a single point.

Question 60

Position Vector

Answer 60

An arrow drawn from the "origin" to an object's position.

Question 61

Linear

Answer 61

Along a line

Question 62

SI Units

Answer 62

The **_I_**nternational **_S_**ystem of Units.

Question 63

What are the basic SI units

Answer 63

seconds meters kilograms

Question 64

"Order of Magnitude" Estimate

Answer 64

A one significant figure estimation or calculation.

Question 65

The study of motion

Answer 65

Kinematics

Question 66

If you are in a car and you feel any of the things below, you know you are \_\_\_\_\_\_\_\_\_\_\_\_\_\_. * Pushed back into your seat. * Thrown forward into your seatbelt * Pushed sideways into the door.

Answer 66

accelerating