Mechanical Power
Power in mechanical systems is the combination of forces and movement. In particular, power is the product of a force on an object and the object's velocity, or the product of a torque on a shaft and the shaft's angular velocity.
Mechanical power is also described as the time derivative of work. In mechanics, the work done by a force F on an object that travels along a curve C is given by the line integral:
where x defines the path C and v is the velocity along this path. The time derivative of the equation for work yields the instantaneous power,
In rotational systems, power is the product of the torque τ and angular velocity ω,
where ω measured in radians per second.
In fluid power systems such as hydraulic actuators, power is given by
where p is pressure in pascals, or N/m2 and Q is volumetric flow rate in m3/s in SI units.
Read more about this topic: Power (physics)
Famous quotes containing the words mechanical and/or power:
“A man should have a farm or a mechanical craft for his culture. We must have a basis for our higher accomplishments, our delicate entertainments of poetry and philosophy, in the work of our hands.”
—Ralph Waldo Emerson (1803–1882)
“The wise man should withdraw his soul within, out of the crowd, and keep it in freedom and power to judge things freely; but as for externals, he should wholly follow the accepted fashions and forms.”
—Michel de Montaigne (1533–1592)