It depends on the suspension setup. Which ever ball joint/control arm has the spring load is the load carrying ball joint.
In most cases the lower one. But it really depends on the vehicle that you failed to mention.
In the shoulder and also your hip is a ball joint. A ball joint is the most mobile joints of the human body. A ball joint allows you to use your legs and arms in a lot of different directions.
Control arm and ball joint are all one unit.
At a shop, about $600.00 the ball joint is one piece on the control arm
One type is a ball and socket joint that connects your arm and shoulder
Ball-and-socket joints allow a wider range of motion than hinge joints.
Ankle is a hinge joint. As it has 'pulley' shaped articular surfaces. Strong medial and lateral ligaments. And permits only two types of movements. Dorsiflexion and planter flex-ion. Movements are allowed in one plane around single axis.
A ball and socket joint is a highly mobile joint. It allows for a wide range of movement in multiple directions due to the rounded end (ball) of one bone fitting into the cup-like socket of another bone. This type of joint is found, for example, in the hip and shoulder.
ball and socket joint - ex. arms
your hip (coxal) joint. a ball and socket joint is one where all types of movement are possble (eg. flexion, extension, abduction, adduction, circumduction ) you can do this at your hip. another ball and socet joint is your shoulder
Ball and socket joint as found in the hip and shoulder.
The shoulder is one of the best known "ball-&-socket joints." It is a freely moveable joint.
You don't have any such joint in your body. Hinge joint, gliding joint, pivot joint, ball and socket, and saddle joint are the ones found. Perhaps you mean pivot. Look here for more information: http://jeffsims.net/flash/skeleton.html