LESSON 1& 2: GENERAL PRINCIPLES AND COMPONENTS OF FORCE

Question 1

Defined as the science that describes and predicts the conditions of rest or motion of bodies under the action of forces

Answer 1

Mechanics

Question 2

2 types of Mechanics of Rigid Bodies

Answer 2

Statics
Dynamics

Question 3

A Mechanics of rigid bodies dealing with bodies at rest.

Answer 3

Statics

Question 4

A mechanics of rigid bodies dealing with bodies in motion.

Answer 4

Dynamics

Question 5

is the foundation of most engineering sciences and is an indispensable prerequisite to their study.

Answer 5

Mechanics

Question 5

The basic concepts used in mechanics

Answer 5

Space, time, mass and force

Question 6

For three-dimensional space problems, ________________ are needed.

Answer 6

three independent coordinates

Question 6

is the geometric region occupied by bodies whose positions are described by linear and angular measurements relative to a coordinate system.

Answer 6

Space

Question 7

For two-dimensional space problems, ____________ are required.

Answer 7

only two coordinates

Question 7

is a measure of the inertia of a body, which is its resistance to a change of velocity.

Answer 7

Mass

Question 7

What are the characteristics of Force

Answer 7

1. its magnitude;
2. he position of its line of action;
3. the direction (or sense) in which the force acts along its line of action

Question 7

is the action of one body on another and tends to move a body in the direction of its action

Answer 7

Force

Question 8

is the measure of the succession of events and is a basic quantity in dynamics.

Answer 8

Time

Question 8

A body is considered __________ when the change in distance | between any two of its points is negligible for the purpose at hand.

Answer 8

Rigid

Question 9

is a body of negligible dimensions, and it is a body whose dimensions are considered to be near zero so that we may analyze it as a mass concentrated at a point

Answer 9

Particle

Question 9

defined as that which changes, or tends to change, the state of motion of a body.

Answer 9

Force

Question 10

If the resultant force acting on a particle is zero, the particle will remain at rest (if originally at rest) or will move with constant speed in a straight line (if originally in motion).

Answer 10

Newton’s First Law

Question 11

If the resultant force acting on a particle is not zero, the particle will have an acceleration proportional to the magnitude of the resultant and in the direction of this resultant force.

Answer 11

Newton’s Second Law

Question 12

The forces of action and reaction between bodies in contact have the same magnitude, same line of action and opposite sense.

Answer 12

Newton’s Third Law

Question 13

This states that two particles of mass M and m mutually attracted with equal and opposite forces F and -F of magnitude F

Answer 13

Newton’s Law of Gravitation

Question 14

is a modern version of the metric system which has received worldwide recognition.

Answer 14

SI Units| International System of units

Question 15

The International System of units, abbreviated Sl after French “______________”

Answer 15

Systeme International d’Unites

Question 16

a force, velocity, or other vector quantity that is equivalent to the combined effect of two or more component vectors acting at the same point.

Answer 16

Resultant