Ball joints act like hinges and connect the suspension control arms to the steering knuckles with a rotating, spherical stud and a socket, giving the wheels a wide range of movement -- from side ...

Ball and socket joints also allow flexion and extension. Flexion of the shoulder joint occurs when the humerus (upper arm) moves forwards from the rest of the body, which happens at the end of an ...

Four important synovial joints used in most sporting actions are the elbow and shoulder joints in the arm, and the knee and ... The shoulder and hip joints are both ball and socket joints.

According to the National Highway Traffic Safety Administration (NHTSA), which quotes information from the manufacturer, “the nut on the upper control arm ball joint may not have achieved the ...