Electric Pipe Threader
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What does the Nm in torque mean, how does it compare to foot lbs?
This is reguarding an electric pipe threader.
In physics, torque can informally be thought of as "rotational force". The SI units for Torque are newton metres although centinewton meters (cN·m), foot-pounds force (ft·lbf), inch pounds (lbf·in) and inch ounces (ozf·in) are also frequently used expressions of torque. The symbol for torque is τ, the Greek letter tau. The concept of torque, also called moment or couple, originated with the work of Archimedes on levers. The rotational analogues of force, mass, and acceleration are torque, moment of inertia, and angular acceleration respectively. The force applied to a lever, multiplied by its distance from the lever's fulcrum, is the torque. For example, a force of three newtons applied two metres from the fulcrum exerts the same torque as one newton applied six metres from the fulcrum. This assumes the force is in a direction at right angles to the straight lever.
More accurately, torque on a particle (which has the position r in some reference frame) is defined as the cross product:
torque=r * F
where F is the force acting on the particle, and r is the particle's position vector.
1 newton meter = 0.737 562 147 pound foot.
(The torque on a electric dipole with electric dipole moment p due to an electric field E is given by :
p*E)
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