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what is the definition of torque & how is it used to solve for it & force

2006-09-27 03:58:49 · 4 answers · asked by Chris D 1 in Science & Mathematics Physics

4 answers

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 generally, one may define torque as the cross product:
Torque = r X F

where F is the force vector and r is the vector from the axis of rotation to the point on which the force is acting.

2006-09-27 04:07:55 · answer #1 · answered by noesis 2 · 0 0

Force x Moment Arm = Torque

2006-09-27 11:01:19 · answer #2 · answered by bmaldon04 2 · 0 0

Torque is a force applied at some distance from a pivot point.
So 10 lbs of force applied to a wrench 1 foot long = 10 ft-lb.
If you know two of Torque, Force, Distance, you can solve for the remaining one:

T=FD
F=T/D
D=T/F

2006-09-27 11:03:47 · answer #3 · answered by Carter S 2 · 0 0

The definition of torque is how far your heels come up off the floor when taking a morning pee.

2006-09-27 11:01:23 · answer #4 · answered by Just me 2 · 0 0

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