A joint is formed when two or more bones come into contact
Types of joints
Joints are divided into 3 groups according to their degree of movement.
Immovable joints such as the bones of the skull (known as sutures) which are fused.
Partly movable joints have cartilage between them which allows for a small degree of movement e.g.
between the vertebrae also called
cartilaginous joints .
Synovial joints are freely movable and are divided into 4 groups
Hinge joints - e.g elbow and knee joints which allow movement in one plane only
Ball and Sock
et joints - e.g. shoulder and hip joints
allows free movement in almost all directions.
Pivot joint - between atlas and axis vertebrae – allows for turning movement of head
Gliding joints - between ankle bones and wrist bones – allows for rotational movements of
hands and feet
Structure of synovial joint
The joint is completely enclosed in a bag-like joint capsule forming a
synovial cavity.
The joint capsule is lined by a
synovial membrane which secretes
synovial fluid filling the entire cavity thereby
reducing friction
The ends of the bones are covered in
hya l
ine articular cartilage
In addition to the joint capsule, other ligaments are present which attach bones
to each other
SYNOVIAL JOINT
Questions & Answers
A golfer on a fairway is 70 m away from the green, which sits below the level of the fairway by 20 m. If the golfer hits the ball at an angle of 40° with an initial speed of 20 m/s, how close to the green does she come?
A mouse of mass 200 g falls 100 m down a vertical mine shaft and lands at the bottom with a speed of 8.0 m/s. During its fall, how much work is done on the mouse by air resistance
Chemistry is a branch of science that deals with the study of matter,it composition,it structure and the changes it undergoes
Adjei
please, I'm a physics student and I need help in physics
Adjanou
chemistry could also be understood like the sexual attraction/repulsion of the male and female elements. the reaction varies depending on the energy differences of each given gender. + masculine -female.
Pedro
A ball is thrown straight up.it passes a 2.0m high window 7.50 m off the ground on it path up and takes 1.30 s to go past the window.what was the ball initial velocity
2. A sled plus passenger with total mass 50 kg is pulled 20 m across the snow (0.20) at constant velocity by a force directed 25° above the horizontal. Calculate (a) the work of the applied force, (b) the work of friction, and (c) the total work.
you have been hired as an espert witness in a court case involving an automobile accident. the accident involved car A of mass 1500kg which crashed into stationary car B of mass 1100kg. the driver of car A applied his brakes 15 m before he skidded and crashed into car B. after the collision, car A s
can someone explain to me, an ignorant high school student, why the trend of the graph doesn't follow the fact that the higher frequency a sound wave is, the more power it is, hence, making me think the phons output would follow this general trend?
Nevermind i just realied that the graph is the phons output for a person with normal hearing and not just the phons output of the sound waves power, I should read the entire thing next time
Joseph
Follow up question, does anyone know where I can find a graph that accuretly depicts the actual relative "power" output of sound over its frequency instead of just humans hearing
Joseph
"Generation of electrical energy from sound energy | IEEE Conference Publication | IEEE Xplore" ***ieeexplore.ieee.org/document/7150687?reload=true
A string is 3.00 m long with a mass of 5.00 g. The string is held taut with a tension of 500.00 N applied to the string. A pulse is sent down the string. How long does it take the pulse to travel the 3.00 m of the string?
