Chapter 2: Laws Governing Motion

Question 1

Who came up with the the concept of force being necessary to sustain all motion that was thought to be true for nearly 2,000 years.

Answer 1

Aristotle

Question 2

Who understood the law of inertia several decades before Isaac Newton.

Answer 2

Galileo Galilei

Question 3

Motion at a constant speed in a straight line.

Answer 3

Uniform Motion

Question 4

The condition of an object when no unbalanced forces act upon it. A state of motion always refers to being at rest.

Answer 4

State of Uniform Motion

Question 5

A push or pull on an object.

Answer 5

Force

Question 6

What did Sir Isaac Newton do?

Answer 6

In 1687 Isaac Newton published in the book Principia Mathematica the three laws of motion that bear his name.

Question 7

The speed in a particular direction of a moving body.

Answer 7

Velocity

Question 8

Rate of change of velocity per unit time, or change of velocity divided by the time required for the change.

Answer 8

Acceleration

Question 9

Toward a center

Answer 9

Centripetal

Question 10

Every object at rest, or in uniform motion, will remain in that state of motion unless compelled to do otherwise by forces acting upon it.

Answer 10

First Law of motion

Question 11

What is this?
Force = mas x acceleration
F=ma
a=F/m

Answer 11

Second Law of motion

Question 12

A push or pull on an object

Answer 12

Force

Question 13

The sum of all the forces present on a body.

Answer 13

Net Force

Question 14

A measure of the force of gravity pulling on an object.

Answer 14

Weight

Question 15

All forces result form interactions between pairs of objects, each object exerting a force on the other. The two resulting forces have the same strength and act in exactly opposite directions.
Forces occur only when two things interact with each other.

Answer 15

Third Law of motion

Question 16

The characteristic of a body which determines how much it accelerates when a force is applied.

Answer 16

Mass

Question 17

Force of you on Earth = Force of Earth on you

Answer 17

Third Law of motion

Question 18

Earth’s mass x Earth’s acceleration = Your mass x Your acceleration

Answer 18

Second Law of motion allows us to

substitute mass x acceleration for the place of force.

Question 19

The portion to the total force that is unopposed by other forces and so will cause an acceleration.An unbalanced force means that the net force is not zero.

Answer 19

Unbalanced Force

Question 20

How do Newton’s Three Laws of motion work together?

Answer 20

2

Question 21

How do “state of motion”, “velocity”, & “acceleration” relate to each other?

Answer 21

State of motion is the speed and direction of an object, speed is the velocity of the moving object, and accelerating is the force given to move the object up to velocity.

Question 22

What is the relationship between force, mass, and acceleration.

Answer 22

Mass determines the needed force to move an object. As the force accelerates the mass the more force increases the more the mass will accelerate.

Question 23

What laws of motion if you were to slip on a banana peal?

Answer 23

Third law of motion.

Question 24

The laws of nature are treated differently for an object in uniform motion and an object at rest.

Answer 24

false

Question 25

If an object changes its state of motion (i.e. its direction or speed) then it must be accelerating.

Answer 25

true

Question 26

When an astronaut travels to the moon, his or her weight changes. Therefore, the astronaut's mass must also change.

Answer 26

false

Question 27

For an object to change its state of motion, an unbalanced force must act on it.

Answer 27

true

Question 28

Objects that interact always exert the same force on one another.

Answer 28

true

Question 29

A boat glides through the water on a lake at constant speed in a straight line. What Law of motion is this?

Answer 29

1st Law

Question 30

An airplane circles the airport at a constant speed while waiting to land. What Law of motion is this?

Answer 30

2nd Law

Question 31

A marathon runner begins running faster just before crossing the finish line. What Law of motion is this?

Answer 31

2nd Law

Question 32

Comparing all forces that arise when a book sits on a table. What Law of motion is this?

Answer 32

3rd Law

Question 33

Describing the motion of a bench in the park. What Law of motion is this?

Answer 33

1st Law

Question 34

Comparing the forces responsible for accelerating a bullet and the recoil of a gun? What Law of motion is this?

Answer 34

3rd Law

Question 35

A hot air balloon rising straight up at a constant speed. What Law of motion is this?

Answer 35

1st Law

Question 36

A submarine falling straight towards the ocean bottom at a constant speed. What Law of motion is this?

Answer 36

1st Law

Question 37

Describing the forces created as two boxers' gloves come in contact What Law of motion is this?

Answer 37

3rd Law

Question 38

correctly describe rocket propulsion

Answer 38

The rocket pushes back on its own exhaust gases. These gases pushing on the rocket are responsible for the acceleration of the rocket.

Question 39

When a body is acted upon by a single constant unbalanced force,

Answer 39

it will experience a constant acceleration in the direction of the force.

Question 40

If an object is moving in a straight line at a constant speed, which of the following must be true?

Answer 40

The total force on the object is zero.