BioMechanics is branch of Sicience which deals with effect of forces acting on a living of, Cheat Sheet of Physics

Download BioMechanics is branch of Sicience which deals with effect of forces acting on a living of and more Cheat Sheet Physics in PDF only on Docsity! UNIT - 8 Biomechanics and Sports Key Points : 8.1. Meaning & Importance of Biomechanics 8.2 Types of Movements (Flexion, Extension Abduction and Adduction) 8.3 Newton’s Laws of motion & its application in sports 8.4 Friction & Sports. 8.1 Meaning & Importance of Biomechanics Meaning of Biomechanics: Bio + Mechanics Bio  Living organism Mechanics  Branch of Physical scince 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. Importance of Biomechanics In Selection and Improvement of Technique To develop advanced sports equipment To develop new training method To speedup recovery process To prevent from sports Injuries To improve sports skill For movement economy www.tiwariacademy.com www.tiwariacademy.com MCQ | Objectice Types Question Answer Q.1. Which is not the Importance of Biomechanics (a) Improvement of Technique (b) To understance the structure of Movement & effect of forces on the Movement (c) To understand Physiology of human body (d) Imporvement of sports Equipments Q.2. Biomechanics Deals units. (a) Muscles involved in Movement (b) Effect of force on Diffrent Movements done by human body (c) To undestand the physiology of the body (d) To understand Time & Distance concept of Various Movements Long Answer type Question (5 marus) Q.1. What is Biomechanics? How it helps in the field of sports & games. 1 + 4 = 5 Ans. Bio :  living organism Mechanics : Branch of Physics. Which deals with effect of force on the object BioMechanics is branch of Sicience which deals with effect of forces acting on a living of organism in moving condition or in Stationary conditon. Biomachanics helps in the field of sports in the following way. 1. Imporvement of Technique: Biomechanics helps to improve technique. It determine how the technique should be execute to get best result. www.tiwariacademy.com Q.3. Opening of hand sidewise when our hand is moving away from body is example of (a) Abduction (c) Adduction (c) Flexion (d) Extension Long Short Answer type Question (5 marks) Q.1. Discuss the Abduction, Adduction, flexion & extension with suitable examples in detail? Name the Movements which occours in legpress exercise? 4 + 1 = 5 Ans. (1) Abduction: It is that Movement in which  moving body part move away from the midline of body  It always occours on frontal plane & segittal axis. Example: Moving of hand in sidewise disection i.e. hand going away from body. (2) Adduction: It is that Movement in Which  Moving part coming towards the midline of body  It alway occour at frontal plane segittal axis Example to back his hand to Attention position from the hands opening sides stage (3) Flexion: It is that movement  In which the joint on which the movement occous. There will be decrease in the angle between the bone of that joint  It always occours at segittal plane & frontal axis Example: Bending of Elbow and bending off knee www.tiwariacademy.com (4) Extension: It is that movement  In which the angle between the bone of that joint on which movement is occoured will increase.  It always occours at segital plane & frontal axis Example: Straighting of elbow from bending position – Straighting of knee from bending position in leg press exercise – In leg press exercise flexion of knee joint and extension of knee joint take place. Questions (3 Marks) Q.1. What is the Abduction? Give Two suitable examples Q.2. What is Flexion? Give two suitable examples. Q.3. Diffrentiate Between Flexion & Extenhsion with suitable examples. Q.4. Diffrentiate between Abduction and Adduction. Questions (5 Marks) Q.1. Explain Abduction, Adduction, Flexion & Extension with suitable examples. Q.2. How we can Identify the Abduction, Adduction, Flexion & extension movements is various joints of our body? Explain with examples. 8.3 Newton’s Laws of motion and their application in sports. www.tiwariacademy.com Newton's laws of motion Ist law of motion (Law of Inertia) IInd law of motion (Law of acceleration) IIIrd law of motion Law of Action Reaction MCQ | Objectice Types Question Answer (1 Marks) Q.1. 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 Q.2. In the long jump take off which law works (a) Ist law of newton (b) IInd law of newton (c) IIInd law of newton (d) Low of conservation of mass. Q.1. What are the newton’s law of mation? Explain the Application of IInd law of Motion (any two applications) 3 + 2 = 5 Ans. Ist Law of Motion (Law of Inertia): any object will be remains in its position until or unless any external force is applied on it. IInd law of motion (Low of Acceleration): The rate of change of acceleation is directly proportional to the force applied on the object and Inversly proportional to the mass of the object. IIIrd law of motion (low of action and Reaction): There will be equal & opposite reaction to each & every action www.tiwariacademy.com the opposite direction of the applied force. Type of frictions: Static friction: The opposite force that comes into play when one body is actually not moving over the surface of another body. Dynamic friction are two types. Rolling friction: The oppsing force that comes into play when body is actually rolling over the surface of another body. For example, hockey/cricket ball is hit Force direction Speed direction Friction Rolling friction Sliding Friction: The opposite force that comes into play when one body is actually slide over the surface of other body for example sliding on the field of cricket by a fielder. Long Answer type Qyestion (5 Marks) Q.1. Differentiate between advantage & disadvantage of friction in the field of sports. Ans. Friction is usually called necessary evil. It means it is essential in the life and we can not do any work without it. Advantages of friction Disadvantages of friction (a) Keeps the object at (b) Wear and tear of object: position by friction, the Due to friction, there is wear objects can be placed and tear of objects. at position and shaped. Lubrication is used to allow the parts to move easier, moreover, prevents wear and tear. www.tiwariacademy.com (b) Helps to move: Frictional (b) Wastage of Energy: Excess forces helps to move the of friction means extra object by friction. It helps energy, thus energy is in running, walking. with being wasted. friction of feet/ shoes on the surface, helps to speed. Frictional force helps to move the object in the speed. For example: Spikes are used by the athletes to run fast. (c) Hold or grip an object: (c) Slow down the Speed: In the with the help of friction the roller Sketting, Rolling Shoes ridges of skin of our and smooth surface are fingers and our palm used to minimize friction. enable us to grab and hold objects. For example– In badminton the players use grip to hold it. (d) Produce heat: The law of (d) Makes movement difficult: conservation of energy Friction can make the job states that the amount of more difficult when one has energy remain constant. to move the object. Excess Thus, the energy that is friction can make it difficult Questions (3 Marks) Q.1. What do you understand by friction? Explain its types Q.2. Explain dynamic friction withsuitable examples Q.3. What is the diffrence among static friction, kinetic friction & fluid friction. www.tiwariacademy.com Questions (5 Marks) Q.1. How friction is helpful in sports give 5 suitable examples. Q.2. What is friction? Explain its role in spots. MCQ | Objectice Types Question Answer Q.1. Match the following (1 Marks) (a) Abduction (i) Decreasing in Angle (b) Newton’s IInd law (ii) Frictional force (d) Force That opposre (iii) Away from mide line Movement (d) Flexion (iv) Law of Acceleration (a) a – iii, b – iv, c – ii, d – i (b) a –iv, b – iii, c – ii, d – i (c) a – iv, b – iii, c – i, d – ii (d) a – ii, d – iv, b – iii, c – i Q.2. Match the following marks (a) Mechanical friction (i) Increased in angle (b) Law of Inertia (ii) Object are solid comes in contract (c) Take off highjump (iii) IIIrd law of motion (d) Extension (iv) Things Remains in its postion (a) a – ii, b – iv, c – iii, d – ii (b) a – iv, b – ii, c – iii, d – i (c) a – iv, b – ii, c – i, d –iii (d) a – iii, b – ii, c – i, d – iv www.tiwariacademy.com