Αποτελέσματα Αναζήτησης
12 Μαρ 2024 · The perpendicular distance is also sometimes called the lever arm or moment arm or torque arm. We can draw these lines for our example problem: Diagram of the flexed arm showing the line of action of the gravitational force and the perpendicular distance from the pivot to the line of action. Image adapted from Openstax University Physics.
Torque is the cross product of force cross length of the lever arm; it is involved whenever there is a rotating object. Torque can also be expressed in terms of the angular acceleration of the object. The determination of torque’s direction is relatively easier than that of angular velocity.
Torque Torque is the rotational analogue of force. When a net force acts on a rigid body that is not considered a point particle it can cause the object to rotate about a rotation axis or a rotation point (called fulcrum or pivot). Mathematically, torque is defined as the cross vector of the force vector and distance vector (called lever-arm).
Torque is the turning or twisting effectiveness of a force, illustrated here for door rotation on its hinges (as viewed from overhead). Torque has both magnitude and direction.
The perpendicular distance is also sometimes called the lever arm or moment arm or torque arm. We can draw these lines for our example problem: Diagram of the flexed arm showing the line of action of the gravitational force and the perpendicular distance from the pivot to the line of action. Image adapted from Openstax University Physics.
Describe how the magnitude of a torque depends on the magnitude of the lever arm and the angle the force vector makes with the lever arm; Determine the sign (positive or negative) of a torque using the right-hand rule; Calculate individual torques about a common axis and sum them to find the net torque
This video defines torque in terms of moment arm (which is the same as lever arm). It also covers a problem with forces acting in opposing directions about a pivot point. (At this stage, you can ignore Sal’s references to work and mechanical advantage.)
