Question

find out a door in your school that produces a creaky sound every time you open or close it .why does it .what does happen? what will you do to get rid of that sound ?​

Answer 1

Strictly speaking, the creaking sound comes from the hinge rather than the door frame itself. The hinge creaks due to stick-slip motion of the hinge when we open the door. Here, we study how the stick-slip motion comes about when we open the door. The diagram below shows a sketch of a door hinge.

Follow me so that I can help you in solving your other problems

...

Thankyou and have a nice day...