The discussion revolves around the concepts of angular momentum and torque in the context of forces acting on an extended object. The original poster presents a problem involving two forces, F and -F, and their effects on net force and torque about a point P.
Some participants have pointed out the need for clarity in the problem statement regarding the separation of forces and the conditions under which torque is calculated. There is an ongoing examination of the definitions and assumptions related to the forces and their effects.
Participants note that the original poster did not fully adhere to the forum's homework posting guidelines, which may affect the clarity and productivity of the discussion.
Skoob, you're new to PF. PF Rules require that you fill out all three parts of the HW Template when you post a thread so you can get help. Merely typing in the question without showing an attempt at solution just wastes your time and doesn't lead to anything productive. PF is not a HW service.Skoob said:Homework Statement
Consider two forces F and -F that act at different points on an extended object. Show that the net force of this combination is zero and that the torque about any point P is independent of the location of P, and depends only on the separation of the two points at which the forces act.
Homework Equations
So this basically revolves around the concept of equilibrium.
The Attempt at a Solution
Skoob said:So this basically revolves around the concept of equilibrium.
That is wrongly worded. It should say "depends only on the separation of the lines of action of the two forces". That is, it is not whole the separation of the two points, only the component of that separation that is at right angles to the two forces.Skoob said:depends only on the separation of the two points at which the forces act.
haruspex said:That is wrongly worded. It should say "depends only on the separation of the lines of action of the two forces". That is, it is not whole the separation of the two points, only the component of that separation that is at right angles to the two forces.
Yes, but I let that pass since F is clearly given as an input.Mister T said:And on the magnitude of F.