reviewer (definitions) Flashcards
___________ is defined as the science that describes and predicts the condition of rest or motion of bodies under the action of forces.
Mechanics
A _________ is any positive or negative physical quantity that can be completely specified by its magnitude.
Scalar
Two forces having the same magnitude, parallel lines of action, and opposite sense, are said to form a _________.
Couple
This principle states that the conditions of equilibrium or motion of a rigid body is replaces by another force of the same magnitude and same direction.
Principles of Transmissibility
This law states that two particles of different masses are mutually attracted with equal opposite forces.
Newton’s Law of Gravitation
This law states that if the resulting forces acting on a particle is zero, the particle remains at rest (if originally at rest) or moves with constant speed in a straight line (if originally in motion).
Newton’s First Law or the Law of Inertia
This law states that if the resultant force acting on a particle is not zero, the particle has an acceleration proportional to the magnitude of the resultant and in the direction of the resultant force.
Newton’s Second Law
The forces of action and reaction between bodies in contact have the same magnitude, same line of action, and opposite sense.
Newton’s Third Law
A _______ is any physical quantity that requires both magnitude and a direction for its complete direction.
Vectors
It is a measure of rotation about a point.
Moment
This is the perpendicular distance between couple multiplied by the magnitude forces that make up the couple.
Moment of a Couple
_________ is a force that resists the movement between two contacting surfaces that slide relative to one another.
Friction
A ________ is a structure composed of slender members joined together at their end points.
Truss
__________ is the load which will be distributed over the length of the beam in such a way that rate of loading will be uniform throughout the distribution of the beam.
Uniformly Distributed Load
__________ is the load which will be distributed over the length of the beam in such a way that rate of loading will not be uniform throughout the distribution of the beam.
Uniformly Varying Load
It is built into a rigid support at one end, with the other being free. The build-in support prevents displacements as well as rotations of the end of the beam.
Cantilever Beam
It has two supports, the pin/hinge and roller support.
Simply Supported Beam
It is said to be supported by a pin and a roller support, with one or both ends of the beam extending beyond the supports.
Overhanging Beam
It is the combination of the cantilever beam and a simple supported beam.
Propped Cantilever Beam
A _______ is supported at both ends and is restrained against rotation at the supports.
Fixed Beam
It is the load that acts at a point on the beam.
Point Load
If two vectors are added together, the the result is called _________ vector.
Resultant
In vector addition, the resultant is formed by an algebraic or scalar addition if and only if the vectors are _________.
Collinear
Which of the following assumptions is/are TRUE regarding the analysis of trusses?
I. All joints are pin connected and free from friction.
II. Members will be subjected to only axiel forces.
III. Self weight of members is negligible.
IV. The loading is such that forces in the member are within elastic limit.
I, II, III & IV
