Can you explain what we are actually doing. Not just the answer. Thanks So there

Question

Can you explain what we are actually doing. Not just the answer.

Thanks

So there are two ways to calculate the magnitude of torque. Place origin at the axis so that d = r. Here r is the displacement vector from the axis to the point of application. The line of action is a line in the direction of the force through the point of application. The moment arm denoted by h is the perpendicular distance from the line of action to the axis. The torque around the axis is tau = plusminus (r sin theta )F tau = plusminus h F {+clockwise -clockwise Here, F is the component of the force perpendicular tor. In other words, it is the perpendicular part of the force. Then we have tau = plusminus F(sin theta) tau = plusminus r F{+ counterclockwise -clockwise Define the following: a. Point of application of force F Line of action of force F Leaver arm for torque about a certain axis due to force F

Explanation / Answer

Point of Application
The point of application is the exact location at which a force is applied to a body. This point is usually described by a set of coordinates and is represented graphically by the tip of the arrowhead. The point of application is unique to each force. The point and the force cannot move. If several forces of equal magnitude are present in a given situation, the forces are unique based open the point of application, the line of action and their sense. It can happen that forces of equal magnitude share the same point of application, in this case, the line of action and sense determine their uniqueness.

Line of Action
A force can be seen as a segment of an indefinitely long line. To each force is associated a characteristic line, which is referred to as its line of action. A reference axis is used in order to describe the orientation of this line.

Leaver Arm-The magnitude of the torque with respect to a given axis of rotation can be approached as the force times the lever arm with respect to that axis. The lever arm is the perpendicular distance from the axis of rotation to the line of action of the force. The direction of the torque is given by the right hand rule.

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