# Question: you have a clothespin hanging from a wire and a...

###### Question details

- You have a clothespin hanging from a wire, and a known mass,
*m*, attached to it.- Determine the maximum mass
*m*that can be held up by the clothespin (without opening, and slipping from the wire) if the number of coils of the torsional spring,*N*, the outer diameter,*OD*, the wire diameter,*WD*, the lengths of the legs and the position of the springs legs are known. - How should a torsion spring be designed to hold up a specified
mass
*m*, what are the equations for this spring design. - If a force was applied to open the clothespin above of the
torsion spring (to the left in the drawing), what is the force that
would be necessary to open the torsion spring, show the equation
relating a force to the properties of the spring (
*N, OD, k, WD, etc…*). How would this force change (decrease) when it is applied below the spring, to the right in the drawing.

- Determine the maximum mass