Engineering Mechanics 200-250 Flashcards
1
Q
- Each force or couple putted on a free diagram represents a model of how a body is affected by it surroundings.
A
Forces and couples of a free body
2
Q
- It is a structure made of two force members all pin is connected to each other.
A
Truss
3
Q
- A body which has forces applied onto it at only three points and no couples applied onto it at all.
A
A two force member
4
Q
- A body which has forces applied onto it at only three pounts and no couples applied onto it at all.
A
A three force
5
Q
- This method uses free body diagrams of sections of the truss to obtain unknown forces.
A
Method of joints
6
Q
- This method uses free body diagrams of sections of the truss to obtain unknown forces.
A
The method of sections
7
Q
- Some members in the truss which cannot carry load.
A
zero force member
8
Q
- In the free diagram load is directly transmitted from each member to the one opposite without any interaction.
A
A redundant joint
9
Q
- These members must be removed from the truss, other wise one will have an insufficient number of equations
A
Redundant members
10
Q
- Sometimes there is too much freedom in a structure, the following structures cannot carry load since it will collapse under the load.
A
mechanism
11
Q
211.Two forces acting on a two force member are along the line connecting the two points on which the loads are applied.
A
Curved members
12
Q
- A general triangular object which is placed between two objects to either hold them in place or is used to move one relative to the other.
A
Wedges
13
Q
- It is a combination of a two wedges obtain from the opening the helical treads.
A
screw
14
Q
- If the lead angle is selected such that in the absence of a screwing moment.
A
Self-locking screw
15
Q
- Is the second moment of area around a given axis.
A
Area moment of inertia
16
Q
- Can be calculated if we have a rectangular coordinate system, one can define the area moment of inertial around the axis.
A
Parallel axis theorem
17
Q
- If the distance away from the axis that all the area can be concentrated to result in the some moment of inertia.
A
Radius of gyration
18
Q
- The explicit form of the laws of mechanics depend on this and is used to reference the motions.
A
Inertial frame
19
Q
- Law which governs the motion for a rigid body.
A
Euler’s law
20
Q
- For a single particle of mass its linear momentum by its mass times its velocity.
A
Linear momentum of particle
21
Q
- Is assumed to be the sum of the linear momentum of its particles.
A
linear momentum of a body
22
Q
- For a particle of mass is defined as the moment of linear momentum across the point.
A
Angular momentum of a particle
23
Q
- A vector itself which has a magnitude equal to the rate of rotation.
A
Angular velocity
24
Q
- It is the rate of change of the angular velocity with respect to time.
A
angular acceleration
25
Q
- When two surface come into contact forces are applied by each other surface on the other.
A
Friction force
26
Q
- The frictional forces that can result between two surfaces slide relative to each other.
A
Static friction
27
Q
- The frictional forces that can result when two surfaces are sliding to each other is proportional to the normal force applied on the surface.
A
Kinetic friction
28
Q
- Refers to the state just before surfaces start to slip.
A
Pending motion
29
Q
- It is a method for predicting failure of a structure containing a crack.
A
Fracture mechanics
30
Q
- The study of deformation typically in the elastic range.
A
deformation mechanics
31
Q
- It is the study on how fluids react to forces.
A
Fluid mechanics
32
Q
- A method of applying mechanics that assumes all objects are continuous.
A
Continuum mechanics
33
Q
- Under this condition the forces or vectors are transformed into a polygon.
A
Graphical condition
34
Q
- If three or more non-parallel forces or vectors are in equilibrium they must be concurrent.
A
Directional condition
35
Q
- If corces or vectors are in equilibrium, then it must satisfy the three static equations.
A
Analytical condition
36
Q
- IT is the application of fluid mechanics in engineering.
A
Hydraulics
37
Q
- When the loading is uniformly distributed horizontally the cable is analyzed as
A
Parabolic
38
Q
- When the loading is distributed along the cable the cable is analyzed as
A
catenary
39
Q
- Is one whose action is not confined to or associated with a unique line in space.
A
Free vector
40
Q
- Is one for which a unique line in space must be maintained along which the quantity acts.
A
Sliding vector
41
Q
- Is one which a unique point of application is specified and therefore the vector occupies a particular position in space.
A
Fixed vector
42
Q
- It is defined as the sicence which considers the effects of forces on rigid bodies
A
Engineering mechanics
43
Q
- It considers the effects is distributuion of forces on rigid bodies which are and remain at rest.
A
Statics
44
Q
- It is defined as a definite amount of matter the parts which are fixed in position relative to each other.
A
Rigid body
45
Q
- It is the branch of mechanics which deals with the study of bodies in motion.
A
Dynamics
46
Q
- Its is defined as a condition in which the sultant of a system of force is equal to zero.
A
Equilibrium
47
Q
- The forces by which determine how the loads applied to a structure are distributed throughout the structure.
A
Analysis of structure
48
Q
- In _______ the members are subjected to bending action.
A
Frames
49
Q
- In _______ the inter nal force in a bar is directed along the axis of bars.
A
Trusses
50
Q
250 . It may be defines as te contact resistance exerted by one body upon a second body when the second body move or tends to move past the first body.
A
Friction
