Door Rotation: The Influence of Attached Rods and Forces

[Erunanethiel]

If I were to put attach a long rod to the side of a door (the exact opposite of the side where it is hinged, the slim part)

And then I apply a force to the the right side of the rod I attached, would the door rotate to the right, or would the hinge completely oppose the force and the door wouldn't move?

 

[Drakkith]

It would rotate, as the force is not directly in line with the hinge, producing torque on the door.

 

[Ibix]

Attaching a rod to a door is a reasonable model of "taking hold of the door handle". So doesn't this question boil down to "can I open a door", or am I misunderstanding something?

 

[CWatters]

It's not possible to answer the original question without a diagram.

 

[Erunanethiel]

It's not possible to answer the original question without a diagram.

I am on mobile, do you have any suggestions on how I can draw the diagram and upload it here?

 

[CWatters]

Draw one on paper, take a good photo, upload it?

 

[Erunanethiel]

Draw one on paper, take a good photo, upload it?

 

[CWatters]

The door will rotate anticlockwise.

 

[A.T.]

do you have any suggestions on how I can draw the diagram and upload it here?

Wouldn't it have been simpler to find a door and try it?

 

[Erunanethiel]

Wouldn't it have been simpler to find a door and try it?

It would, but I like my doors enough to not hammer a nail to hold a rod in them

 

[A.T.]

It would, but I like my doors enough to not hammer a nail to hold a rod in them

And they have no handles sticking out?

 

[Ibix]

A useful trick in general is to imagine extending a situation to the point of absurdity. Imagine lengthening the rod until it's ten miles long. Then you've got something that looks very like a rod on a fulcrum, and your question becomes "can I tip a rod about a fulcrum?" Hopefully the answer is obvious.

 

[jbriggs444]

It would, but I like my doors enough to not hammer a nail to hold a rod in them

In the U.S. they sell various kinds of clamps in home improvement stores. I have a few in my garage. No need to hammer in nails.

http://www.homedepot.com/p/DEWALT-12-in-Medium-Trigger-Clamp-2-Pack-DWHT83158/204356349

 

[Erunanethiel]

In the U.S. they sell various kinds of clamps in home improvement stores. I have a few in my garage. No need to hammer in nails.

http://www.homedepot.com/p/DEWALT-12-in-Medium-Trigger-Clamp-2-Pack-DWHT83158/204356349

I am not in USA, all we have here is nails

 

[jbriggs444]

I am not in USA, all we have here is nails

They do not glue boards together in wherever-istan? Possibly I am about to be educated in how things are done elsewhere.

 

[Erunanethiel]

They do not glue boards together in wherever-istan? Possibly I am about to be educated in how things are done elsewhere.

The main reason I didn't do it is it would take a lot of explaining to my family and can't do it without looking at least a little crazy of a person

 

[jbriggs444]

The main reason I didn't do it is it would take a lot of explaining to my family and can't do it without looking at least a little crazy of a person

My father once asked me a rhetorical question about whether it was better to be thought "normal" by one's peers or to live your own life. He lived his own life well.

 

[A.T.]

The main reason I didn't do it is it would take a lot of explaining to my family and can't do it without looking at least a little crazy of a person

You don't need a rod, if the door has handles. Just push on the handle the way you indicated in your diagram. The door will rotate if the line of action of the force doesn't pass through the hinge axis.

 

[Erunanethiel]

My father once asked me a rhetorical question about whether it was better to be thought "normal" by one's peers or to live your own life. He lived his own life well.

Bless him