Acceleration, in physics, is the rate of change of velocity of an object. An object's acceleration is the net result of any and all forces acting on the object. Accelerations are vector quantities - they have magnitude and direction. As a vector, the calculated net force is equal to the product of the object's mass (a scalar quantity) and the acceleration. Accelerations have a main role in the description of acts movement and their manipulation by forces.
The strain (formular symbol: ε) is a specification for relative changes of length (expansion respectively contraction) of an obstacle under stress, for example through a force od change of temperature (heat expansion). When the dimension of the obstacle expands, this is called a positive strain (stretching), otherwise it is called a negative strain or compression.
Torque, or is a physical quantity used in the classic mechanical science. It is equaly important for the rotatory motion as the force for the linear motion. Torque can accelerate or slow down the rotation of an object or distort and bend an object.
The rotational speed (or orbital frequency) is a value that indicates the rate of the rotations of - preferably meachnical – rotational motions. The rotational speed is for example an essential feature in the identification of the performance parameters of engines.
Pressure is a measure for resistance that matter sets against the decrease of the available space. Pressure is an intense, scalar, physical value that has got the SI unit pascal. The usual formula symbol p origins in the the word "pressure".
Force is a basic expression in physics. In the classic science of physics, a force is any interaction that, when unopposed, will change the motion of an object. In other words, a force can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e. to accelerate. Forces are i.e. necessary to perform a task through which the energy of a body or physical system changes.
The frequency (from latin: frequentia) is – in physics and engineering - a measurement for how fast repetitions happen in a periodic process, for example a continuous oscillation. The frequency is the reciprocal of periodic time.
Speed (formular sign: v, latin: velocitas) is a basic term of classical mechanics. Is is defined by the direction of a movement and the sum and is therefore a vector value. The sum indicates, which distance a point of a body travels within a certain amount of time.
Electric current is the total of all electric appearances, that are the reason for a magnetic field. The electric current is connected to the directed movement of charge carriers regarding the convection current. The moving charge carriers are quite often the negativly charged electrons in a metal object.
Voltage (U) is the difference in electric potential energy between two points per unit electric charge. The voltage between two points is equal to the work done per unit of charge against a static electric field to move the charge between two points.
An odometer is an instrument that indicates distance traveled by a vehicle, such as a bicycle or automobile. The device may be electronic, mechanical, or a combination of the two. The word derives from the Greek words hodós ("path" or "gateway") and métron ("measure"). Distance measurements, interval measurements or length measurements are so called measurements of the distance between two points in a room through a direct or indirect comparison with a lenght measuring unit like e.g. meter.
The electrical resistance of an electrical conductor is the opposition to the passage of an electric current through that conductor. The inverse quantity is electrical conductance, the ease with which an electric current passes. Electrical resistance shares some conceptual parallels with the notion of mechanical friction.
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