Engineering Mechanics 151-200 Flashcards
1
Q
- It is the intensity of the force.
A
Magnitude
2
Q
- Sense and slope of angles with respect to reference axes
A
Direction
3
Q
- The resultant of two forces which is the diagonal formed on the vectors of this force.
A
Parallelogram law
4
Q
- Any pressure on the support causes an equal and opposite pressure from the support.
A
Action and reaction
5
Q
- Two forces on a rigid body will in no way to be changed if we added or subtract from them another system of forces in equilibrium.
A
Superposition law
6
Q
- Quantities which possess magnitude.
A
Scalar quantities
7
Q
157 Quantities having both magnitude and direction.
A
Vector quantities
8
Q
- Quantities which possess magnitude but require two or more directional aspects.
A
tensors
9
Q
- When several forces act in a given situation.
A
System of forces
10
Q
- All forces of the system are in a common line action.
A
collinear forces system
11
Q
- The action line of all the forces are in the same plane and intersect a common point
A
concurrent, coplanar
12
Q
162.The action line of all the forces of the system are parallel and lie in the same plane
A
parallel, coplanar
13
Q
- The action line of all the forces of the system are in the same plane, but they are not parallel and don’t intersect in a common point.
A
non concurren, coplanar
14
Q
- The action line of all the force are not in the same plane and intersect a common point.
A
concurrent, non-coplanar
15
Q
- The action lines of all the forces of the system are parallel and not all lie in the same plane.
A
Parallel, non-coplanar
16
Q
- The action lines of all forces of the system are all not in the same plane but they are all not parallel do not intersect in a common point.
A
non concurrent, non-coplanar, non-parallel
17
Q
- The simplest force system that can replace the original system without changing its external effect.
A
Resultant
18
Q
- A pair of parallel forces having same magnitude bur opposite senses.
A
Couple
19
Q
- The process of replacing a force system by its resultant
A
composition
20
Q
- A pictorial respresentation in solving a system
A
Graphical
21
Q
- Is used to obatin the magnitude and direction of the resultant of any two concurrent forces.
A
Triangle law
22
Q
- An analytical method of finding the resultant of concurrent forces.
A
Resolution
23
Q
- Means that either one of two coplanar forces having the given force as resultant.
A
components
24
Q
- Is used to check the results obtained from the resoltuion and composition methods.
A
Polygon method
25
175. Its is a vector quantity that is represented as a vector along the moment axis.
Moment of force
26
176. The algebraic sum of the moment of its forces about any axis perpendiculat to the plane of the couple.
The moment of the couple.
27
177. The force of attraction of the earth on a body
Weight
28
178. Theorem of pappus which state that the surface area of any solid of revolution is the product of the length multiplied by the distance travelled.
1st proposition
29
180. The volume of any solid of revolution is the product of the generation area
2nd proposition
30
181 Theorem used in locating the centroid of the semicircle arc.
Pythagorean theorem; Newton's theorem; Pappus theorem
none of the above
31
182. A system of forces acting on a body which has no resultant.
Equilibrium
32
182. A system of forces acting on a body which has no resultant.
Equilibrium
33
183. It is a skectch of a body completely isolated or free from all other bodies.
Free body diagram
34
184. It is a definite amount of matter the parts of which are fixed in position relative to on another.
Rigid body
35
185. Its is the action exerted by one body upon another.
force
36
186. A unit force
Newton
37
187. The extenal effect of a force in a rigid body is the same for all points along its line of action
Principle of transmissiblity of a force
38
188. The resultant of two forces is the diagonal formed on two vectors of thos forces
Parallelogram law
39
189. The forces are in equilibrium only when equal in magnitude opposite in direction and colinear in action.
Axioms of mechanics
40
190 It is a convenient corollary of the parallelogram law.
Triangle law
41
191. The determination of the resultant of 3 or mote concurrent forces that are not colinear.
resultantof concurrent, coplanar
42
192. Addition which is followed by the parallelogram law desscribed by the figure.
addition of the vector
43
193. An object with inertia but of negligible dimension
Particle
44
194. A particle is in equilibrium if the resultant
Equilibrium equation for a particle
45
195. In a rectangular coordinate system, the equilbrium equation can be represented by three sacalar equations.
Equilibrium equation in component form
46
196. A mechanical device that can onlu transmit a tensile force along itself.
string or cable
47
197. A mechanical device that can which exerts a force along its line of its action and propotional of its extension.
Linear spring
48
198. The tension in the cable is the same on both sides of the pulley.
Frictionless pulley
49
199. Each action has a reaction has a reaction equal in magnitude and opposite in direction.
newton's 3rd law
50
200. Forces and couples which are a result of interaction between one part of an object and another part of it will not appear in the free body diagram of the whole object.
Composite bodies and external source
