Just "Truss" Me
What's Your Vector, Victor?
Have You Got a Moment?
I'm the Centroid of Attention
Dreadful Diagrams
"S" Words
30
The state of Member DB(Tension, Compression, Etc)
What is tension?
30
The resolution of vector F1 in the x and y directions.
What is:
F1x = 680 N
F1y = 510 N
30
You apply a force of 6 pounds perpendicularly to a wrench that is 7 inches long which creates this amount of moment.
What is 42 in-lbs?
30
This theorem is frequently used in computing the moment of inertia of an area or mass.
What is the parallel axis theorem?
30
The maximum shear the beam experiences.
What is 600 N?
30
Your statics course instruction has been of this quality.
Any flattering "s" word is acceptable.
40
The zero force member in the truss shown,
What is member BC?
40
External forces and dimensions are used in this kind of drawing.
What is a free body diagram?
40
The maximum moment for this loaded beam will be experienced at this location.
What is Point B?
40
A rigid body which has more support reactions than are necessary to hold it in equilibrium is said to be this.
What is statically indeterminate?
40
The maximum moment the beam experiences.
What is 600 N-m?
40
The equation, F = kd, is used to define the behavior of this.
What is a spring?
50
Test
This kind of drawing is useful in evaluating equilibrium of a rigid body.
What is a free body diagram?
50
These are the three static equilibrium equations (2D)
What are ∑Fx=0, ∑Fy=0, and ∑M=0?
50
The equation for moment is force multiplied by distance acting in this direction (parallel/perpendicular).
What is perpendicular?
50
This is the formula for calculating the centroid of a triangle.
What is base/3? (or 2*base/3)
50
In the equation for beam deflection, the symbol I stands for this.
What is moment of inertia?
50
A unit of mass.
What is a slug?
60
The type of support that has two force reactions and a moment reaction (2D)
What is a fixed moment?
60
This kind of vector has a magnitude of 1.
What is unit vector?
60
Produced by two noncollinear forces that are equal in magnitude but opposite in direction
What is a couple moment?
60
The resultant force of a the distributed load shown.
What is 1650 lbs?
60
In constructing a shear and moment diagram for a loaded beam, this should first be determined.
All reactive/support forces.
60
A rigid body that has more unknown forces than equations of equilibium is said to be this.
What is statically indeterminate?
70
The method of finding forces in members of a truss structure that involves cutting the stucture
What is method of sections
70
The sum of the forces in a state of equilibrium
What is zero
70
The notation in this class for a moment in the counter clockwise direction
What is positive?
70
Equation/formula for calculating the centroid of a complex shape
What is (sum of areas times centroids) divided (by sum of areas)?
70
When evaluating an internal force within a beam, the moment at the right face of a section is assumed to be positive in this direction.
What is counterclockwise?
70
A dot product of two vectors yields this type of answer.
What is a scalar answer?
80
The two key equations used by method of joints
What is ΣFx=0 and ΣFy=0
80
The magnitude of the resultant force of vectors F1 = (10i + 20j) N + F2 = (20 i + 20j) N.
What is 50 N?
80
The moment at the nut in ft-lbs when a 50-lb force is applied perpendicularly to a 9-inch wrench.
What is 37.5 ft-lbs?
80
Formula for Ix of a rectangle
What is (1/12)bh^3?
80
The moment diagram for the loading and shear diagram shown is expected to have this shape.
What is a cubic equation form?
80
Between 2 surfaces, this is greater than kinetic.
What is static friction.
100
If two forces are applied to a rigid body, the forces must have these two properties in order for the body to be in equilibrium.
What are equal magnitude, and opposite in the line direction?
100
This star statics student thinks a vector is a rat at the landfill.
Who is Drake the cat?
100
The force shown creates a a moment at Point O of this magnitude.
What is 600 N-m?
100
The distance of the centroid of a half circle from its bisecting line is defined by this relationship.
What is 1/8(pi) r4?
100
On a moment diagram for a beam, the change in moment between 2 points on the beam will have this relationship to the shear diagram shown between the same to points.
What is equal to the area under the shear diagram.
100
If an object rests on this type of surface, then that surface will exert a force N on the object which is normal to that surface.
What is a smooth surface.