Let\'s say I have a door, 1 m wide, hinged on the left side, and I pull it open
ID: 2024416 • Letter: L
Question
Let's say I have a door, 1 m wide, hinged on the left side, and I pull it open with a door nob. To open the door, I need a torque of 2 Nm (Newton meters). If the handle is on the right side, I need to pull or push with a force of ___ to move it. If the handle is in the middle, I need a force of ____ to move it. If the handle is 10 cm from the hinge, I need a force of ____ to move it.
I'm not sure on where to begin. I really don't understand torques and if you could explain it with equations that would be awesome.
Explanation / Answer
The torque is equal to the force you exert times the distance from the hinge, so to get 2 Nm, you would need to give 2 Nm /1 m = 2 N at the right side, 2 Nm / .5 m = 4 N in the middle, or 2 Nm / .1 m = 20 N at 10 cm from the hinge.
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