Wednesday, February 11, 2009
The Principle of moments is a theorem concerning torques.
Moment of a vector is a generalization of the moment of force. The moment M of a vector B about the point A is
where
is the vector from point A to the position where quantity B is applied.
× represents the cross product of the vectors.
Thus M can be referred to as "the moment M with respect to the axis that goes through the point A", or simply "the moment M around A". When B is the force, the moment of force is the torque as defined above.
Moment of inertia (
)is analogous to mass in discussions of rotational motion.
Angular momentum (L = Iω) is the rotational analog of momentum. (Angular momentum was sometimes referred to as "moment of momentum".)
Magnetic moment (
)is a dipole moment measuring the strength and direction of a magnetic source.
Simply put, The equation of the moment of the force. M=Fd
M= moment F=force d= distance from the pivot
where
is the vector from point A to the position where quantity B is applied.× represents the cross product of the vectors.
Thus M can be referred to as "the moment M with respect to the axis that goes through the point A", or simply "the moment M around A". When B is the force, the moment of force is the torque as defined above.
Moment of inertia (
)is analogous to mass in discussions of rotational motion.Angular momentum (L = Iω) is the rotational analog of momentum. (Angular momentum was sometimes referred to as "moment of momentum".)
Magnetic moment (
)is a dipole moment measuring the strength and direction of a magnetic source.Simply put, The equation of the moment of the force. M=Fd
M= moment F=force d= distance from the pivot
+ [ written by SEOWHWEE ] + 2:59 AM