kleeds said:nevermind you square them all, add them, then take the square root.
A moment vector expression is a mathematical representation of the moment of a force or torque acting on a body. It includes both the magnitude and direction of the moment and is typically represented as a vector with a specified point of application.
The magnitude of a moment can be determined by taking the cross product of the force vector and the position vector, both of which are included in the moment vector expression. The resulting magnitude is measured in units of force multiplied by distance, such as newton-meters.
Yes, the direction of a moment can be determined by the right-hand rule. If the fingers of your right hand wrap around the force vector in the direction of rotation and your thumb points in the direction of the position vector, then the direction of the moment will be perpendicular to both vectors and pointing outwards.
The moment vector expression includes both the magnitude and direction of the moment, while the moment arm only represents the distance between the point of application and the axis of rotation. The moment arm is a scalar quantity, whereas the moment vector is a vector quantity.
Yes, the net moment on a body can be calculated by summing all of the individual moment vectors acting on the body. This can be achieved by breaking down the vector expression into its components and using vector addition to find the resultant moment.