At its core, a doorknob uses the circular motion to apply pressure, via a sort of hook, against the latch of the door. This then pulls the latch inwards, allowing the door to open.
A door hinge is magnetic when a door opens the magnetic forces kind of swivel making the door stay attached to the wall but turn.
Or thats what i was told anyway.
They are exactly the same.... -they open and close when a force acts on them -they are desined and made to slide upon each of the other parts
A door hinge is a second class lever.
by using lubricant
Thanks
yes because when they brake the friction is caused to reduce
Oil is used to reduce friction.
Moving mechanical parts usually need some degree of lubrication so that they do not waste energy in overcoming friction. A very simple case of this would be a door hinge. If the door hinge has too much friction, the door squeaks when you open or close it. It moves smoothly and quietly if it is lubricated. With something like the motor of a car or an airplane, friction would present much more serious problems than the squeak of a door hinge. You would get terrible overheating and eventually an explosion, in an unlubricated motor.
the main reason for doing so is that the surface becomes smooth n in terms of science to reduce "friction" that wud exist between the board n the striker due to which it will move more swiftly with lee deployment of power..!!
not exactly door hinge does if you say it weird but no not really.
Im Pretty Sure Its Fluid Friction??? ;)
i am sure that it is liquid friction trust me i am a science teacher
It reduces the coefficient of friction.
door hinges attached to door and hinge post
Decreasing friction:- add a lubricant (like oil in a door hinge)- rolling objects (e.g. rollerblades)- streamlining (like making an aircraft a special shape to reduce wind resistance)Source(s):I have a good memory and listen in school
door hinge pin
The friction on a hinge needs to be small at the pivot point where the hinge rotates. This allows smooth movement and prevents the hinge from sticking or getting stuck. However, in other parts of the hinge, such as the pins or brackets, a small amount of friction may be desirable to provide stability and prevent excessive movement.
Bro, DOOR-HINGE. Door-hinge rhymes with Orange.
Friction is the force that opposes the motion. It is the force between two surfaces rubbing together. Actually there are three kinds of friction:static friction - friction occurs at rest. It is also the strongest type of friction.kinetic friction - friction that occurs when an object is in motion.rolling friction - the weakest of all the three.So that's the basic definition of friction and its kind.add Commonly, the status of the friction alternates between static and sliding many times per second. Commonly called 'slip stick' friction. This is the cause of a squeaky door hinge, the crunch of snow, and even if some remarkable 'singing sands' in some deserts.[Alongside a squeaky door hinge you'll often find a deposit of fine dark powder - this is iron dust - some of the iron actually torn off the hinge surface in moving between these two frictions. ]
The very easiest way is this: # Remove the middle hinge pin. (bottom hinge pin if you only have two hinges) # Set it on a concrete sidewalk, driveway etc. laying flat. # Hit it with a hammer in the middle. This will bend the pin slightly, causing friction in the hinge and, once put back in the hinge, it should hold the door in any position you open it to.
No, sand does not reduce friction but increase friction.
A door which hangs on hinges. The hinge is what allows a door to open and close and is made of metal, attached to the door by bolts or screws.