Statics Midterms

Question 1

It is the branch of Physical Science which describes and predicts the conditions of rest or motion of bodies under the action of forces.

Answer 1

Mechanics

Question 2

What are the three divisions of mechanics?

Answer 2

• Mechanics of Rigid Bodies
• Mechanics of Deformable Bodies
• Mechanics of Fluids

Question 3

What are the two divisions of mechanics of rigid bodies?

Answer 3

• Statics
• Dynamics

Question 4

This deals with the bodies at rest.

Answer 4

Statics

Question 5

This deals with bodies in motion.

Answer 5

Dynamics

Question 6

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

Answer 6

Newton’s Law of Gravitation

Question 7

This states that the conditions of equilibrium or of motion of a rigid body will remain unchanged if a force acting at a given point of the rigid body is replaced by a force of the same magnitude and same direction, but acting at a different point, provided that the two forces have the same line of action.

Answer 7

The Principle of Transmissibility

Question 8

If the resultant forces acting on a particle are 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 8

Newton’s First Law

Question 9

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

Answer 9

Newton’s Third Law

Question 10

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

Answer 10

Newton’s Second Law

Question 11

This states that two forces acting on a particle maybe replaced by a single force, called the resultant, obtained by drawing the diagonal of a parallelogram which has sides equal to the given forces.

Answer 11

Parallelogram Law for the Addition of Forces

Question 12

What are the Three System of Units (International System of Units or SI Units)?

Answer 12

• Length
• Mass
• Time

Question 13

This is defined as the distance between two fine lines of a bar of platinum - iridium alloy.

Answer 13

standard meter

Question 14

The 1960 conference redefined the meter as ____________ wavelengths of the reddish-orange light emitted by the isotope krypton-86.

Answer 14

1, 650, 763.73

Question 15

It is defined as the mass of 1 cubic decimeter of pure water at the temperature of its maximum density (4.0°C / 39.2°F).

Answer 15

Kilogram

Question 16

It is the basic unit of time.

Answer 16

Seconds

Question 17

The unit for Moment of a Force.

Answer 17

N-m

Question 18

This represents the action of one body on another and is generally characterized by its point of application, its magnitude, and its direction.

Answer 18

Force

Question 19

A system of force in which the lines of action of all the forces intersect at a common point.

Answer 19

Concurrent force system

Question 20

A type of concurrent force system where forces lie on one plane (two-dimensional).

Answer 20

Coplanar

Question 21

A type of concurrent force system where forces are in space (three dimensional).

Answer 21

Spatial

Question 22

A system consists of forces that are parallel.

Answer 22

Parallel force system

Question 23

this is system is not concurrent nor parallel.

Answer 23

Non-Concurrent, Non-Parallel force system

Question 24

The simplest system that can replace the original system without changing its external effect on a rigid body.

Answer 24

Resultant of a force system

Question 25

It is a sketch of isolated body which shows only the forces acting upon it.

Answer 25

Free Body Diagram (FBD)

Question 26

The forces on the free-body diagram are action forces called __________.

Answer 26

applied forces

Question 27

The _________ are those exerted by the free body upon other bodies.

Answer 27

reaction forces

Question 28

Tension of unknown magnitude T in the direction of the support

Answer 28

cable

Question 29

Compression of unknown magnitude C in the direction of the support

Answer 29

Strut

Question 30

Force unknown magnitude N normal to the surface supporting the support

Answer 30

Rocker/Roller

Question 31

Unknown force R and direction θ or vertical (Ry) and horizontal (Rx) components of R.

Answer 31

Frictionless pin or hinge/Rough surface

Question 32

Force unknown magnitude N directed normal to the surface

Answer 32

Smooth surface

Question 33

Unknown force R, its direction θ and moment M {or vertical (Ry), horizontal (Rx) components of R and moment M}

Answer 33

Fixed

Question 34

The particle is in __________ if the resultant of the forces is equal to zero.

Answer 34

equilibrium

Question 35

When a force is applied to a body it will produce a tendency for the body to rotate about a point that is not o the line of action of the force.

Answer 35

Moment or Moment of a Force

Question 36

The tendency for the body to rotate, or moment, can also be called a ______.

Answer 36

torque

Question 37

It is defined as 1 / 86400 of a mean solar day (see Day) or one compete rotation on its axis.

Answer 37

Time

Question 38

ganda ko, ‘no?

Answer 38

ayusin mo