Engineering Mechanics 200-250 Flashcards
(50 cards)
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
225. When two surface come into contact forces are applied by each other surface on the other.
Friction force
26
226. The frictional forces that can result between two surfaces slide relative to each other.
Static friction
27
227. The frictional forces that can result when two surfaces are sliding to each other is proportional to the normal force applied on the surface.
Kinetic friction
28
228. Refers to the state just before surfaces start to slip.
Pending motion
29
229. It is a method for predicting failure of a structure containing a crack.
Fracture mechanics
30
230. The study of deformation typically in the elastic range.
deformation mechanics
31
231. It is the study on how fluids react to forces.
Fluid mechanics
32
232. A method of applying mechanics that assumes all objects are continuous.
Continuum mechanics
33
233. Under this condition the forces or vectors are transformed into a polygon.
Graphical condition
34
234. If three or more non-parallel forces or vectors are in equilibrium they must be concurrent.
Directional condition
35
235. If corces or vectors are in equilibrium, then it must satisfy the three static equations.
Analytical condition
36
236. IT is the application of fluid mechanics in engineering.
Hydraulics
37
237. When the loading is uniformly distributed horizontally the cable is analyzed as
Parabolic
38
238. When the loading is distributed along the cable the cable is analyzed as
catenary
39
239. Is one whose action is not confined to or associated with a unique line in space.
Free vector
40
240. Is one for which a unique line in space must be maintained along which the quantity acts.
Sliding vector
41
241. Is one which a unique point of application is specified and therefore the vector occupies a particular position in space.
Fixed vector
42
242. It is defined as the sicence which considers the effects of forces on rigid bodies
Engineering mechanics
43
243. It considers the effects is distributuion of forces on rigid bodies which are and remain at rest.
Statics
44
244. It is defined as a definite amount of matter the parts which are fixed in position relative to each other.
Rigid body
45
245. It is the branch of mechanics which deals with the study of bodies in motion.
Dynamics
46
246. Its is defined as a condition in which the sultant of a system of force is equal to zero.
Equilibrium
47
247. The forces by which determine how the loads applied to a structure are distributed throughout the structure.
Analysis of structure
48
248. In _______ the members are subjected to bending action.
Frames
49
249. In _______ the inter nal force in a bar is directed along the axis of bars.
Trusses
50
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.
Friction
