Unit 10 -
Today, biomechanics is playing a very important role in improving the performance of sportspersons. Now-a-days, physical education teachers, coaches and physical trainers are concerned with helping individuals to learn how to move efficiently and
Sports can be described as the physics of sports. In this subfield of biomechanics, the laws of mechanics are applied in order to gain a greater understanding of athletic performance through mathematical modelling, computer simulation and measurement.
Very Short Answer Type Questions (1 Mark)
Q1. Elaborate the term Biomechanics.
Q2. Elucidate projectile motion.
Q3. Define linear motion.
Q4. Give one most important mechanical difference between walking and running.
Q5. What is a projectile?
Q6. What is gravity?
Q7. What do you mean by air resistance?
Q8. What is angular motion?
Q9. Define work.
Ans. Work refers to an activity involving a force and the movement in the
Work = Force x Distance
Q10. Define power.
Ans. Power is the rate of doing work or the rate of using energy. The above definition can be expressed as an equation.
Power = Work/Time
Q11. Define Energy.
Q12. State Static Friction.
Short Answer Type Questions (3 Marks)
Q1. State any two factors which affect the projectile trajectory.
2. The distance covered by an object depends on the initial velocity of the projectile. If the initial velocity is more, the object covers maximum distance. On the other hand, if initial velocity is less, the object covers less distance.
Q2. Elucidate kinetic energy and potential energy.
Q3. What is the difference between kinetic and potential energy?
Ans. 1. Kinetic Energy:
2. Potential Energy:
Q4. Discuss various types of friction.
Q5. What are the factors which affect projectile trajectory?
Q6. What is projectile? State any one factor which affect projectile trajectory.
Spin also affects the flight of an object. In fact, the amount and direction of spin acting on a projectile directly affects the distance covered or travelled by a projectile. The main reason behind this fact is the air pressure acting on the ball. For example: in a tennis shot top spin gives a poorer distance in comparison to back spin. As a matter of fact, a top spin shot creates a region of high pressure on the top of the ball and low pressure
Q7. Is friction advantageous or disadvantageous in the field of sports of games and sports?
Consequently it can he said it is advantageous in some of the sports and disadvantageous in others.
Q1. Discuss the angular and linear movement in detail.
Q2. Discuss the mechanical analysis of walking in detail.
(iii) Late flat-foot:
(iv) Heel rise:
(v) Toe off:
Q3. Describe the factors affecting the trajectory of a projectile.
(ì) Propelling Force:
(ii) Force of Gravity:
(a) Weight (mass) of the object
(b) Amount of force driving it upward
(c) The effect of air resistance on the object.
(iii) Effect of Air Resistance:
Q4. Elucidate the types of friction.
(i) Static Friction:
(ii) Limiting Friction:
(iii) Kinetic Friction:
Q5. Discuss the mechanical analysis of running.
(a) Swing Phase: