Mechanics

thumb|right|A gyroscope in equilibrium

A pulley is a wheel on an axle or shaft enabling a taut cable or belt passing over the wheel to move and change direction, or transfer power between itself and a shaft.

thumb|A wood splitting wedge

type of inertial force

force that makes a moving body follow a curved path

singular aggregation of tangible substance(s) such as matter or radiation, with overall properties

thumb|350px|Illustration showing the directional trajectory of a bullet fired at an uphill target

common mnemonic for understanding orientation of axes in three-dimensional space

alt=A 3D simulation demonstrating collision with a ball knocking over some blocks.|thumb|A 3D simulation demonstrating a collision with a ball knocking over a bunch of blocks In physics, a collision is any event in which two or more bodies exert forces on each other in a relatively short time. Although the most common use of the word collision refers to incidents in which two or more objects collide with great force, the scientific use of the term implies nothing about the magnitude of the force.

a process in which objects are destroyed by collapsing (or being squeezed in) on themselves

twisting of an object due to an applied torque

thumb|Truss bridge for a single-track railway, converted to pedestrian use and pipeline support. In this example the truss is a group of triangular units supporting the bridge. thumb|Typical detail of a steel truss, which is considered as a revolute joint thumb|Historical detail of a steel truss with an actual revolute joint A truss is an assembly of members such as beams, connected by nodes, that creates a rigid structure.

practical application of mechanics

branch of science that studies the behavior of solid materials

thumb|Ductile failure of a metallic specimen strained axially

curve connecting two points such that a bead sliding frictionlessly in a uniform gravitational field moves to the other endpoint the fastest

system of forces with a resultant moment but no resultant force

theorem in vector calculus

thumb|Buckled skin panels on a Boeing B-52 Stratofortress|B-52 aircraft. Thin skin panels buckle at very low loads. In the case shown here, the weight of the forward fuselage structure ahead of the nose undercarriage is sufficient to cause the panels to buckle. Buckled panels are still effective in carrying shear by diagonal tension. thumb|On the front of a new Siemens Venture railway coach made of stainless steel, unevenness caused by buckling becomes apparent because of the reflection on the polished surface. In structural engineering, buckling is the sudden change in shape (deformation) of

wave which is an oscillation of matter

theorem in planar dynamics

measure of the force amplification achieved by using a tool, mechanical device or machine system

way of transmitting mechanical power

geometric engineering calculation technique

(of mechanical system) number of independent parameters that define its configuration; number of parameters that determine the state of a physical system and is important to the analysis of systems of bodies

dimensionless measure for the damping of an oscillator

computation of deformations, deflections, and internal forces or stresses within structures

phenomenon of deformation due to structural stress

"effective" inertial mass appearing in the two-body problem of Newtonian mechanics; quantity which allows the two-body problem to be solved as if it were a one-body problem

classroom demonstration used to illustrate principles of classical mechanics

curve for which the time taken by an object sliding without friction in uniform gravity to its lowest point is independent of its starting point

in analytical mechanics, the work of a force on a particle along a virtual displacement

thumb|Plastic utensils in a photoelasticity experiment

diagram where all forces on a body or part of a system are drawn

calculation commonly applied to engines and mobile power sources

Geomechanics (from the Greek γεός, i.e. prefix geo- meaning "earth"; and "mechanics") is the study of the mechanical state of the Earth's crust and the processes occurring in it under the influence of natural physical factors. It involves the study of the mechanics of soil and rock.

measure used to characterise inelastic collisions

physical quantity, historically invented by G. Leibniz, equivalent to (in modern terminology) twice the kinetic energy

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physical process in which a tangential force is transmitted across an interface between two bodies through dry friction or an intervening fluid film resulting in motion, stoppage or the transmission of power

Type of signal processing filter

factor by which an engineered system's capacity is increased over the expected requirement to ensure safety in the face of error or uncertainty

Displacement in analytical mechanics

theorem

description of particle density in statistical mechanics

difference in pressure between two points of a fluid

mathematical ratio relevant to climbing safety

freedom of movement of a rigid body in three-dimensional space

mathematical expression

modeling of a highly complex system as multiple interconnected, simple components

named after Samuel König

type of train

Diagram in mechanics

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elastic vessels

perpendicular impacts at the CoP will produce no reactive shock at the pivot of a rigid beam

discipline concerned with the use of computational methods to study mechanics

term in mechanics

device consisting of a movable pulley, two wheels with different diameters fixed together serving as the fixed pulley and a chain loop; device multiplying force; machine used to lift heavy loads