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do you mean the direction of moment can be anywhere as long as it is perpendicular to the plane formed by r and F ?tommyxu3 said:Based on the definition if torque:
$$M=r\times F$$
you can tell tell direction of torque by that of your position and the force.
The reference point the figure decided is important, which will influence the direction of the position hence torque also.
I think that is correct, for the choice of the origin's position depends on you and the direction of the vector of the position ##\vec{r}## depends on the observer.goldfish9776 said:the direction of moment can be anywhere as long as it is perpendicular to the plane formed by r and F ?
The moment of specified axis is a measure of the tendency of a force to rotate an object around a specific axis. It is also known as the moment of inertia or rotational inertia.
The moment of specified axis is calculated by multiplying the mass of an object by the square of its distance from the specified axis. This distance is also known as the moment arm or lever arm. The calculation is represented by the formula I = mr^2, where I is the moment of specified axis, m is the mass, and r is the distance.
The units of measurement for moment of specified axis depend on the units used for mass and distance. In the SI system, the units are kilograms per meter squared (kg/m^2). In the US customary system, the units are pound-mass per foot squared (lbm/ft^2).
The moment of specified axis and the moment of inertia are essentially the same concept. However, the moment of specified axis is calculated with respect to a specific axis, while the moment of inertia is calculated with respect to the object's center of mass. In other words, the moment of specified axis is a special case of the moment of inertia.
The moment of specified axis is used in various fields of study, including physics, engineering, and biomechanics. It is an important factor in understanding how objects rotate and how external forces affect their motion. It is also used in designing structures and machines to ensure stability and balance. In biomechanics, it is used to analyze human movement and the effects of forces on the body.