Dynamics

Question 1

It she study of the forces that cause objects and systems to move.

Answer 1

Dynamics

Question 2

It the study of how forces affect the motion of objects.

Answer 2

Dynamics

Question 3

• ________ is a push or pull that can be defined in terms of various standards, and it is a vector having both magnitude and direction

• ________ is a vector that adds just like other vectors

• _______ , like other vectors, are represented by arrows and can be added using the familiar ________ method or by _________ methods

Answer 3

Force

head-to-tail
trigonometric

Question 4

__________ are forces where surfaces touches each other
Examples:

Answer 4

CONTACT FORCES

friction force, normal force, restoring force, and etc.

Question 5

____________ are forces that are acting at a distance. Object’s surfaces don’t touches each other.

Examples:

Answer 5

NON-CONTACT FORCES

Gravitational force, magnetic force, electrical force

Question 6

Effects of force on an object

Answer 6

• Force can set a stationary object im motion
• Can either stop or slow down a moving object
• Can change the direction of a moving object
• Can change the shape of an object by applying force

Question 7

These laws are the foundation of dynamics

Answer 7

NEWTON’S LAWS OF MOTION

Question 8

These laws provide an example of the breadth and simplicity of principles under which nature functions. They are also universal laws in that they apply to similar situations on Earth.

Answer 8

Newton’s Laws of Motion

Question 9

It is the first law of motion

Answer 9

Law of Inertia

Question 10

A body at rest remains at rest, or, if in motion, remains in motion at a constant velocity unless acted on by a net external force.

Answer 10

Newton’s First Law of Motion

Question 11

Rather than contradicting our experience, Newton’s first law of motion states that there must be a cause (which is a ________) for there to be any change in velocity (either a change in magnitude or direction).

Answer 11

Net external force

Question 12

The property of a body to remain at rest or to remain in motion with constant velocity is called _______.

Answer 12

inertia

Question 13

Newton’s first law is often called the ________.

Answer 13

law of inertia

Question 14

_______ is a measure of the amount of “stuff” (or matter) in something. The quantity or amount of matter in an object is determined by the numbers of ______ and _______ of various types it contains

Answer 14

MASS

atoms and molecules

Question 15

• The mass of an object is the same on Earth, in orbit, or on the surface of the Moon.
• Operationally, the masses of objects are determined by comparison with the standard _______.

Answer 15

kilogram

Question 16

________ is the measure of the force exerted on an object due to gravity, and is equal to the product of the mass and acceleration due to gravity.

Answer 16

WEIGHT

Question 17

W = m x g; where m is the mass in ____, g is the acceleration due to gravity of a planet in _____, and W is the weight in ______

Answer 17

kg
m/s2
Newton or N

Question 18

It mathematically states the cause and effect relationship between force and changes in motion.

Answer 18

Law of Acceleration
(Newton’s second law of motion)

Question 19

It is more quantitative and is used extensively to calculate what happens in situations involving a force.

Answer 19

Law of Acceleration
(Newton’s second law of motion)

Question 20

The ________ of a system is directly proportional to and in the same direction as the net external force acting on the system, and inversely proportional to its mass.

Answer 20

acceleration

Question 21

The acceleration of a system is directly proportional to and in the same direction as the ________ acting on the system, and inversely proportional to its ______.

Answer 21

net external force
mass

Question 22

Fnet=ma is used to define the units of force in terms of the three basic units for ____, ____, and _____.

The ______ of force is called the newton (abbreviated N) and is the force needed to accelerate a 1-kg system at the rate of 1m/s2

Answer 22

mass, length, and time

SI unit

Question 23

1N= ?

Answer 23

1kg m/s²

Question 24

__________ is a force perpendicular to the surfaces is contact

Answer 24

Normal force

Question 25

The location of weight can be found in ________

Answer 25

Geometrical center

Question 26

If the force supporting a load is perpendicular to the surface of contact between the load and its support, this force is defined to be a _______

Answer 26

normal force

Question 27

A ________ is a force along the length of a medium, especially a force carried by a flexible medium, such as a rope or cable.

Answer 27

tension

Question 28

The word “tension” comes from a Latin word meaning “________.”

Answer 28

to stretch

Question 29

This law represents a certain symmetry in nature: Forces always occur in pairs, and one body cannot exert a force on another without experiencing a force itself.

Answer 29

LAW OF INTERACTION (Newton’s Third Law of motion)

Question 30

We sometimes refer to this law loosely as “action-reaction,” where the force exerted is the action and the force experienced as a consequence is the reaction.

Answer 30

LAW OF INTERACTION (Newton’s Third Law of motion)