The hip is definitely the ball and socket joint involving the femur and also the pelvis or hip bone. The first functionality in the hip would be to bear excess weight and to maneuver your leg. Both the ‘socket’ on the pelvis (called the acetabulum) and ‘ball’ with the femur https://www.theorthopaedicandpainpractice.com/what-are-proximal-femur-fractures/?_gl=1*xbbxlb*_up*MQ..&gclid=Cj0KCQjwkt6aBhDKARIsAAyeLJ2krYJSOuy5mZksrNqH-VDjQwW1ScD49yD8BUWysDG6u6bJPCSbXVUaAuCPEALw_wcB