STATICS (TERMINOLOGIES) Flashcards
(23 cards)
A _________ is a positive or negative physical quantity that can be completely specified by its magnitude.
Scalar
A _________ is a physical quantity that requires both magnitude and direction for its complete direction.
Vector
It is defined as the science that describes and predict the condition of rest or motion of bodies under the action forces.
Mechanics
If the resulting force acting on a particle is zero, the particle remain at rest (if originally at rest.) or moves with constant speed in a straight line (if originally in motion.
Newton’s first law
this principle states that the conditions of equilibrium or motion of a rigid body remain unchanged if a force acting at a given point of a body is replaced by another force of the same magnitude and direction.
Principle of Transibillity
This law states that two particles of different masses are mutually attracted with equal and opposite forces.
Newton’s Law of Gravitation
Two forces having same magnitude, parallel lines of actions, and opposite sense, are said to form a ____________
Couple
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
It is show graphically by an arrow.
Vector
If two vectors are added together, then the result is called ___________ vector.
Resultant
It is a measure of rotation about a point.
Moment
It is sometimes called as ‘torque’
Moment
The _________ is the perpendicular distance between the couple multiplied by the magnitude of forces that make up the couple.
Moment of a couple
This diagram is a sketch of the outlined shape of the body, which represent it as being isolate or “free” from its surrounding.
Free-body diagram
If the two conditions are met, then the body is said to be in _________, which means it is at rest or will move with constant velocity.
Equilibrium
It is a force that resists the movement between two contacting surfaces that slide relative to one another.
Friction
It occurs between the contacting surfaces of bodies when there is no lubricating fluid.
Dry Friction
It is sometimes called ‘Coulomb Friction’
Dry friction
A _________ is a structure composed of slender members joined together at their end points.
Truss
It has two supports, the pin/hinge and roller support.
Simply supported beam
It is built into a rigid to support at one end, with the orther being free.
Cantilever beam
It is supported by a pin and roller support, with one or both ends of the beam ectending beyond the supports
Overhanging beam
