Second Hinge Of The Door

The first is the pivot and the second is the bracket.

Second hinge of the door.

If your left hand is nearer the doorknob then it is a left handed hinge and door. A wheelbarrow is also a second class lever. Akkadian and hittite panache was so great the massive palaces sacred structures and protective gates they built had heavy doors that operated with load bearing metal hinges. However it is seen on interior doors from time to time.

Hinges have been found in ancient societies in africa asia europe and elsewhere. This hinge is installed against the recess in the door where it is impossible to view from the outside. Another way to determine the door hinge direction is to open the door and stand with your back against the hinge jamb or area. A door belongs to the second class of levers because its pivot hinge is at the end the load weight of the door is at the center while the effort opening the door is applied at the other end.

The pivot allows the door to be opened at a 90 degree angle. Metal was expensive and labor. If each hinge supports half the weight of the door find the magnitude and direction of the horizontal components of the forces exerted by the two hinges on the door. A uniform 26 kg door that is 2 5 m high by 0 80 m wide is hung from two hinges that are 20 cm from the top and 20 cm from the bottom.