Biomechanics is the science concerned with internal and external forces acting on the human body and the effect produced by these forces

1. BIOMECHANICS
BY
CHANDRAKANT BARIK
NIS COACH
KALINGA STADIUM COMPLEX IN-CHARGE

2. BIOMECHANICS
◦ Definition
◦ BIO-LIVING ,MECHANICS-MECHANICALS ASPECTS
◦ • Area of study wherein the knowledge and methods of mechanics are applied to the structure
and function of living human system.
Biomechanics is the science concerned with internal and external forces acting on the human
body and the effect produced by these forces.
◦ Internal External
◦ Muscular forces
◦ Environmental forces
◦ Air
◦ friction - water
◦ Gravity
◦ counter force

3. Importance / contribution of
Biomechanics in Sports YOGA
◦ Evaluation of existing technique for learning and training
◦ Find out faults in the execution of the technique.
◦ Find out causes of faults in the execution of the technique.
◦ Development of new technique, which may be better than the existing technique.
◦ Evaluation of training exercise and equipment
◦ Development of training exercise and equipment.
◦ Quantification of motor abilities.
◦ Development of biomechanical principles as general orientation.
◦ Perfection and refinement of various ` investigational procedures used in biomechanics and to
make them applicable under field condition.

5. Motion
When a body changes its position from one place to
another with respect point i.e., reference to a fixed point.

6. Types of Motion
◦ Linear Motion or Translatory Motion
◦ Rotatory or angular Motion
◦ General Motion

7. Linear Motion or Translatory Motion
◦ It takes place in such a way that all parts of the body move same distance, in the same direction and at
the same time.
◦ – Body moves in a straight line
◦ Types of linear motion
◦ Rectilinear Motion
◦ When a body moves essentially in a straight line
◦ E.g. – a ball dropped from the hand towards the ground.
◦ A freely falling body
◦ Punching in boxing
◦ Curvilinear Motion
◦ when a ball is thrown same distance, gravity acts on it to follow a curved path known as parabola.
◦ E.g. – curved path of shot put

9. Linear motion of a body can be:
◦ Uniform Motion
◦ Equal distance travelled in equal interval of time.
◦ Non-Uniform Motion
◦ Equal distance travelled in unequal interval of time. Or
◦ unequal distance travelled in equal interval of time.
◦

11. Angular Motion
◦ When a body moves along a circular path about some line in space, so that all parts of the body
travels equal equal angles in the same distance in the same time
◦ E.g. – A gymnast swinging on a horizontal bar

12. . General Motion
◦ Combination of linear and angular motion
◦ E.g.
◦ We translate our body in a straight line as a direct result of rotatory motion around our joints.
◦ A Cyclist translate his upper body as a result of rotatory action around his legs.
◦ Thigh translate due to rotation around hip joint Leg translate due to rotation around knee joint
foot translate due to rotation around ankle joint

13. Bio-Mechanics
◦ Kinematics Kinetics
◦ It describe motion of the body What causes a body to move
◦ • Distance • Force
◦ • Displacement
◦ • Speed
◦ • Velocity
◦ Acceleration
◦ • Acceleration due to gravity
• Inertia
• Mass
• Weight
• Impulse
• Pressure
• momentum

14. ◦ Distance
◦ Length of the path covered by the body
◦ Unit – meter (m), centimeter (cm), kilometer (km)

15. ◦ Displacement
◦ Shortest distance between body’s initial and final position.
◦ Unit – meter (m), centimeter (cm), kilometer (km)

16. ◦ Basic Difference
◦ Magnitude and direction
◦ Distance – only magnitude
◦ Displacement – Magnitude + Direction
100m
North south
• Distance = 100m
• Displacement = 100m towards south
• Que- Under what condition, the magnitude of distance and displacement will be same ?
Ans- when the motion is in a straight line

17. ◦ An athlete runs around a 400 m track three times, then they stop.
◦ What is the distance travelled
◦ 1200 m what is displacement?

18. Speed
◦ Rate at which an object covers and distance
◦ Average speed of a body is obtained by dividing distance covered by the time taken
◦ Unit – meter/second (m/s)
◦ Centimeter/second (cm/s)
◦ Kilometer/hour (km/h) (kmph)
◦ Velocity
◦ Velocity of an object is the rate of change f its position with respect to timeand direction
◦ Average velocity of a body is obtained by dividing displacement by the time.
• Unit – m/s, cm/s, km/h

19. Yohan Blake is
travelling at a
speed of 10
m/s

20. Yohan Blake is
travelling at a speed of 10 m/s East

21. Usian Bolt ran
100 m in 9.58
seconds, what
was his average
speed?
10.43 m/s

22. Acceleration
◦ The rate of change of velocity
2 , cm/s
2 , km/h
2

23. Acceleration due to Gravity
◦ The downward acceleration which a body experience while in air is due to the influence of earth
an all the bodies near to its surface.
•it is a constant value at any given place.

25. THANK YOU