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