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In physics , power is the rate at which energy is transferred, used, or transformed.
In physics , a force is said to do work when it acts on a body so that there is a displacement of the point of application, however small, in the direction of the force.
In physics a wave is a disturbance or oscillation that travels through space and matter, accompanied by a transfer of energy .
In classical mechanics , a harmonic oscillator is a system that, when displaced from its equilibrium position, experiences a restoring force , F , proportional to the displacement, x : where k is a positive constant . If F is the only force acting on the system, the system is called a simple harmonic oscillator , and it undergoes simple harmonic motion : sinusoidal oscillations about the equilibrium point, with a constant amplitude and a constant frequency (which does not depend on the amplitude).
In physics , a conservation law states that a particular measurable property of an isolated physical system does not change as the system evolves. One particularly important physical result concerning conservation laws is Noether's Theorem , which states that there is a one-to-one correspondence between conservation laws and differentiable symmetries of physical systems .
Torque , moment or moment of force (see the terminology below), is the tendency of a force to rotate an object about an axis, [ 1 ] fulcrum , or pivot.
This gyroscope remains upright while spinning due to its angular momentum.
In physics, energy is an indirectly observed quantity which comes in many forms, such as kinetic energy , potential energy , radiant energy , and many others; which are listed in this summary article. This is a major topic in science and technology and this article gives an overview of its major aspects, and provides links to the many specific articles about energy in its different forms and contexts. The question "what is energy?"
In physics , a force is any influence that causes an object to undergo a certain change, either concerning its movement, direction, or geometrical construction. It is measured with the SI unit of newtons and represented by the symbol F . In other words, a force is that which can cause an object with mass to change its velocity (which includes to begin moving from a state of rest ), i.e., to accelerate , or which can cause a flexible object to deform .
In classical mechanics , linear momentum or translational momentum ( pl. momenta; SI unit kg m/s , or equivalently, N s ) is the product of the mass and velocity of an object.
In physics , mass (from Greek μᾶζα "barley cake, lump (of dough)") refers to the quantity of matter in an object. More specifically, inertial mass is a quantitative measure of an object's resistance to acceleration .
In physics , acceleration is the rate at which the velocity of a body changes with time. [ 1 ] In general, velocity and acceleration are vector quantities, with magnitude and direction , [ 2 ] [ 3 ] though in many cases only magnitude is considered (sometimes with negative values for deceleration, treating it as a one dimensional vector).
In kinematics , velocity is the rate of change of the position of an object, equivalent to a specification of its speed and direction of motion.
In geometric measurements, length is the longest dimension of an object. [ 1 ] In other contexts "length" is the measured dimension of an object. For example it is possible to cut a length of a wire which is shorter than wire thickness . Length may be distinguished from height , which is vertical extent, and width or breadth, which are the distance from side to side, measuring across the object at right angles to the length.
In physics , motion is a change in position of an object with respect to time and its reference point. Motion is typically described in terms of displacement , velocity , acceleration , and time . [ 1 ] Motion is observed by attaching a frame of reference to a body and measuring its change in position relative to another reference frame.