# Mechanics

## Friction

Friction coefficient. Static friction. Kinetic or dynamic friction. Sliding friction. Rolling friction.

## Energy

Law of conservation of energy. Energy sources. Renewable energy. Non-renewable energy. Chemical energy. Elastic energy. Electric energy. Gravitational energy. Internal energy. Magnetic energy. Mechanical energy. Principle of the conservation of mechanical energy. Mechanical wave energy. Nuclear potential energy. Kinetic energy. Potential energy. Nuclear potential energy. Quantum chromodynamics binding energy. Radiant energy. Rest energy. Soundwave energy. Thermal energy. Wind wave energy. Energy harvesting. Unconventional energy.

## Elastic energy

Elastic energy is potential energy related to elastic force, stored in the deformation of a material (compression or stretching) or a physical system (distortion of volume or shape) exhibiting a restorative …

## Motion

Translation; Rotation; Rototranslation; Plane motion; Uniform motion; Uniform straight motion; Smoothly accelerated motion; Relative motion; Cyclical motion; Circular motion; Steady motion; Transient motion; Anharmonic motion.

## Force

The force may be thought of as an influence which tends to change the motion of an object. Forces are inherently vector quantities, requiring vector addition to combine them. The SI unit for force is the …

## Acceleration

To accelerate means to speed up. The greater the acceleration, the greater the change in velocity over a given time. The average acceleration is the rate at which velocity changes: $a_{avg}=\dfrac{\Delta v}{\Delta t}=\dfrac{v_f-v_0}{t_f-t_0}$ …

## Impedance

Acoustic impedance. Electrical impedance. How to calculate electrical impedance. Mechanical impedance. Wave impedance.

## Gear (cogwheel)

Spur gear. Helical gear. Gear rack. Herringbone gear. Worm gear. Bevel gear. Hypoid gear. Gear errors.

## Kinematic chain

When the kinematic pairs are coupled in such a way that the last link is joined to the first link to transmit definite motion (i.e. completely or successfully constrained motion), …

## Kinematic pair

A kinematic pair is a connection between two physical objects that imposes constraints on their relative movement. In other words: two links or elements of a machine, when in contact with each …

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