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Unit Contents, , 8.1 Meaning and Importance of Biomechanics in Sports, 8.2 Types of movements (Flexion, Extension,, Abduction & Adduction), 8.3 Newton’s Law of Motion & its application in, sports
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Questions in CBSE Sample Paper 2021, Q2. Acceleration of an object will increase as the net, force increases depending on its, a. Density, b. Mass., c. Shape, d. Volume
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Questions in CBSE Sample Paper 2021
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Questions in CBSE Sample Paper 2021, , Q 22. State Newton’s laws of motion and, explain their implication in Sports of your, choice.
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8.1 Meaning & Importance of Biomechanics, Meaning of Biomechanics:, Bio + Mechanics, Bio = Living organism, Mechanics = Branch of Physical, science which deals with, force acting on a body in static, condition or in moving condition., Biomechanics: is the study of, forces & their effects on human, being is moving or in static condition.
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Biomechanics helps in, the field of sports in the, following way., 1. Improvement of, Technique: Biomechanics, helps to improve, technique. It determine, how the technique, should be execute to, get best result.
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2. Improvement of Equipment : If helps to lmprove, equipment. According to nature & safety of the game for, example increase in thickness of mat for high jump., 3. Improvement in Training method : It helps to develop, new Training method to get better result. for example, Development of Isotonic method to develop strength., 4. Development of Skill : It helps to develop skill of the, sports., Example: Development in the skill of fielding in cricket.
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8.2 Types of Movements (Flexion, Extension,, Abduction, Adduction)
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8.2 Types of Movements (Flexion, Extension,, Abduction, Adduction), (1) Abduction: It is that, Movement in which moving, body part move away from, the midline of body. It, always occurs on frontal, plane & sagittal axis., Example: Moving of hand in, sidewise dissection i.e., hand going away from body.
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(2) Adduction :, It is that Movement in which, Moving part come towards, the midline of body. It, always occurs at frontal plane, sagittal axis., Example to back his hand to, Attention position from the, hands opening sides stage
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(3) Flexion :, It is that movement in which the, joint on which the movement, occurs., There will be decrease in the, angle between the bone of that, joint., It always occurs at sagittal plane, & frontal axis., Example: Bending of Elbow and, bending off knee.
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(4) Extension :, It is that movement in which the angle, between the bone of that joint on, which movement is occurred, increase., It always occurs at sagittal plane &, frontal axis., Example: Straitening of elbow from, bending position., Straitening of knee from bending, position in leg press exercise
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8.3 Newton’s Laws of motion and their application, in sports.
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Sir Isaac Newton's three, laws of motion describe the, motion of massive bodies, and how they interact., Newton published his laws, in 1687, in his seminal work, "Principia Mathematica”
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1st Law of Motion (Law of Inertia) :, Any object will be remains in its position until or unless, any external force is applied on it.
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When a book is placed on a table , It remains stationary in, position unless somebody acts to affect it and change its state, When an object is pushed on the floor , It rolls for a, certain distance , then slows down till it stops by the effect, of frictional forces between the object and the floor that, resist rolling ( Friction is an external force that acts to change, the object state ) ., If these forces do not exist , the object would keep moving at, a uniform velocity and would not stop .
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Newton’s First Law, is known as the, Law of Inertia, since the object, can not change its, state of rest, or motion by itself, .
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2nd law of motion (Law of Acceleration) :, The rate of change of acceleration is directly, proportional to the force applied on the object and, Inversely proportional to the mass of the object., , F = ma, m = mass, a = acceleration
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The second law, shows that if you, exert the same force, on two objects of, different mass, you, will get different, accelerations, (changes in motion)., The effect, (acceleration) on the, smaller mass will be, greater (more, noticeable).
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3rd law of motion (low of action and Reaction) :, There will be equal & opposite reaction to each & every, action
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Questions in CBSE Sample Paper 2021, Q2. Acceleration of an object will increase as the net, force increases depending on its, a. Density, b. Mass., c. Shape, d. Volume
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Questions in CBSE Sample Paper 2021
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Questions in CBSE Sample Paper 2021, , Q 22. State Newton’s laws of motion and, explain their implication in Sports of your, choice.
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Questions in CBSE Sample Paper 2021
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Q.1. Which is not the, Importance of Biomechanics, (a) Improvement of Technique, (b) To understand the structure of, Movement & effect of, forces on the Movement, (c) To understand Physiology of, human body., (d) Improvement of sports, Equipments
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Q.2. Newton’s IInd law is also, known as, (a) Law of Action Reaction, (b) Law of Inertia, (c) Law of Acceleration., (d) Law of velocity
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3. Match the following., (a) Flexion, (i) Increase in Angle, (b) Extension, (ii) Away from Mid line of body, (c) Abduction, (iii) Towards the Mid line of body, (d) Adduction, (iv) Decrease in angle, 1. a–IV, b–I, c–III, d–II, 3. a–IV, b–I, c–II, d–III, , 2. c–II, d–III, a–I, b–IV., 4. c–I, d–IV, a–III, b–II
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Q.4. Bending of Elbow when our, hand is going toward our chest is, (a) Flexion., (b) Extension, (c) Abduction, (d) Adduction
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Q5. Opening of hand sidewise, when our hand is moving away, from body is example of, (a) Abduction., (b) Adduction, (c) Flexion, (d) Extension
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