ENGINEERING MECHANICS

Question 1

When all the forces that act upon an object are balanced, then the object is said to be in a state of ______

Answer 1

equilibrium

Question 2

The forces are considered to be balanced if the rightward forces are ______ by the leftward forces and the upward forces are _______ by the downward forces.

Answer 2

balanced

Question 3

is defined as the condition of a body, which is subjected to a force system
whose resultant force is equal to zero

Answer 3

equilibrium

Question 4

means that the forces intersect through a single point.

Answer 4

Concurrent

Question 5

If forces are ______, we can add them together as vectors to get the resultant.

Answer 5

concurrent

Question 6

If the body is not accelerating, it must be in _______ , so that means the resultant is ___.

Answer 6

equilibrium, zero

Question 7

the body is a point

Answer 7

concurrent forces

Question 8

So for concurrent forces in equilibrium, the forces should all _____________

Answer 8

add up to give zero.

Question 9

is the process by which we determine how the loads applied to a structure are distributed throughout the structure.

Answer 9

analysis of structure

Question 10

Although there are many kinds of structures, we limit ourselves here to pin connected types

Answer 10

analysis of structure

Question 11

those that consist of assemblages of bars fastened together by smooth bolts.

Answer 11

pin connected types

Question 12

Our purpose is to determine the forces acting in the bars and upon the pins or hinges of the structures.

Answer 12

Structural analysis

Question 13

In subsequent courses we shall learn how to determine the dimensions of various parts of a structure so they can safely resist these forces.

Question 14

is the determination of the effects of loads on physical structures and their components.

Answer 14

Structural analysis

Question 15

Structures subject to this type of analysis include all that must withstand loads, such as (buildings, bridges, aircraft and ships.)

Answer 15

Structural analysis

Question 16

employs the fields of applied mechanics, material science and applied mathematics to compute a structure’s deformations internal forces, stresses, support reactions, accelerations, and stability.

Answer 16

Structural analysis

Question 17

The results of the analysis are used to verify a structure’s fitness for use, often precluding physical tests.

Answer 17

Structural analysis

Question 18

is thus a key part of the engineering design structures

Answer 18

Structural analysis

Question 19

consists of several bars laying in one plane and connected by hinges or pins at their ends so as to provide a stable configuration.

Answer 19

plane truss or frame

Question 20

are used in the roofs of sheds at Railway platform, workshops and in industrial buildings, bridges etc.

Answer 20

Frames

Question 21

are made of short thin members interconnected at hinges into triangulated patterns.

Answer 21

Plane trusses