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Readers ask: When is torque negative?

What does negative torque mean?

Oh, torque can be positive or negative. Let us say that a positive torque would make a stationary object rotate counter clockwise and a negative torque would make it rotate clockwise. If you switched these, it wouldn’t really matter too much. Also, the torque does depend on the point about which it is calculated.

Under what conditions is the torque zero?

System of Particles and Rotational Motion. Under what condition torque acting on body by a given force is zero? That is, Torque = 0. That is, when line of action of forces passes through the axis of rotation, torque is zero.

Why are clockwise moments considered negative?

Clockwise moments are considered negative when summed with counterclockwise moments because they are opposites of each other, but also because counterclockwise moments are positive since when acting upon an object, they move the object up on the Y-Axis.

How do you determine torque?

A practical way to calculate the magnitude of the torque is to first determine the lever arm and then multiply it times the applied force. The lever arm is the perpendicular distance from the axis of rotation to the line of action of the force. and the magnitude of the torque is τ = N m.

Is clockwise left or right?

Clockwise is spinning in the direction of an analog clock. It is a way to describe circular motion. Left or Right turns are ways of describing a change in approach. Clockwise is constantly turning to the right.

How do you maximize torque?

Torque can be increased in two ways: 1) by increasing the moment arm or 2) increasing the perpendicular force applied to the moment arm. The opposite is true for decreasing torque. If an object is at rest the torques on the object are balanced (they cancel out) and sum of those torques is zero.

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What does it mean when torque is 0?

In general, an object can be acted on by several torques at the same time. A torque is a vector quantity which means that it has both a magnitude (size) and a direction associated with it. Because the net torque is equal to zero, the torques in Example 1 are balanced and acting in equilibrium.

Does torque have direction?

Right Hand Rule for Torque



Torque is inherently a vector quantity. Part of the torque calculation is the determination of direction. The direction is perpendicular to both the radius from the axis and to the force. It is conventional to choose it in the right hand rule direction along the axis of rotation.

Is clockwise positive or negative?

Counterclockwise is the positive rotation direction and clockwise is the negative direction. For example, a torque that rotates an object counterclockwise is a positive torque (see figure 6 below).

Are clockwise moments positive?

Moments are a measure of the turning effect of a force around a specified turning point or pivot. The direction of a moment is opposite to the direction of the force. The convention is that: clockwise moments are positive.

What means negative moment?

Positive moment is when the beam/slab is being forced to curve downwards or Sag (forming a smile) in the midspan, while negative moment is when the beam is forced to curve up (forming a frown) above supports.

At what torque will a bolt break?

If you add 33% to the torque figure listed, that should tell you the torque required to snap it. For example, if it takes 75 ft/lbs to torque to 75% yield, add 33% (25 ft/lbs) to get to the 100% yield (breakage) figure.

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What is a tightening torque?

Torque tightening is the accurate application of torque to a nut so that a bolt can hold its load securely without breaking. Too much torque can break the bolt.

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