self closing gate or door?

Question

has anybody got a design for a self closing gate / door using string, pulley and a heavy weight. my school physics are long forgotten

Answer 1

Yeah, you just need to have the weight suspended in the air. Email me and I could help ya. You could also add a spring or lean the door so it closes like a refrigerator one does. If you use weight and a pulley, the string will have to be connected halfway close to the hinged side so it doesn't get in the way.

Also, I believe in colonial Williamsburg, they have some doors that are set up with weights that are used to close the gate.