What is the r in torque?

Torque is a measure of how much a force acting on an object causes that object to rotate. The distance from the pivot point to the point where the force acts is called the moment arm, and is denoted by ‘r’.

Why is torque force times distance?

The linear (translational) motion and distance covered are maximum for the point that is farthest from the centre of rotation, i.e. the free end. This is pure geometry of circle. Thus the force is more effective when applied at a point farther from the centre of rotation. That’s why it produces more torque.

Why torque is a cross product?

And that is because torque is defined as the cross product between the radial distance from your axis of rotation and the rotational force being applied. So these are both vectors. But then we’ll also see that direction is a little bit– it’s just the definition of the direction of torque.

How is torque defined?

torque, also called moment of a force, in physics, the tendency of a force to rotate the body to which it is applied. Torque is measured in newton metres in SI units.

How do you calculate r in torque?

The magnitude of a torque about a fixed axis is calculated by finding the lever arm to the point where the force is applied and using the relation |→τ|=r⊥F | τ → | = r ⊥ F , where r⊥ is the perpendicular distance from the axis to the line upon which the force vector lies.

What is torque Tau?

Torque is commonly denoted with a capital “T,” but the correct symbol is the Greek letter tau, “τ.” When torque is referred to as a moment of force, the symbol “M” is used. Torque is a vector quantity, meaning it has both magnitude and direction. When this is done, the thumb points in the direction of the torque.

What is torque explain the torque acting on a particle class 11?

Torque is the measure of the force that can cause an object to rotate about an axis. Similarly, torque is what causes an angular acceleration. Hence, torque can be defined as the rotational equivalent of linear force. The point where the object rotates is called the axis of rotation.

What is a torque vector?

I understand the torque vector to be the cross product of the radius (moment arm) and force vectors, but that means the torque would be perpendicular to the radius and force vectors, which makes no sense to me, e.g. a force applied tangent to the surface of a car tire creates a torque along the line of the axle.

When is torque zero and when is torque maximum?

The above result gives the fact that the torque is zero when the flux desnities are aligned, is maximum when the fields are perpendicular, and acts to apply a force on the rotor that opposes the movement. The sinusoidal variation of torque with angle will be seen in the section on synchronous machines.

Is it possible to calculate torque from Lorentz force?

The approach of finding torque from the Lorentz force is not practical in many cases, and in some cases (e.g. in the case when calculating the force between two permanent magnets) requires some fairly advanced approximations or assumptions. In the field of electric machines there is usually a space between the moving surfaces.

Why is torque called the moment of force?

Torque is the moment of force because it conveys the (perpendicular) distance where this force acts upon. Any component of location along the line of action needs to be ignored and this is achieved with the vector cross product.