# Biomechanics and Sports Class 12 Questions and Answers

Teachers and Examiners (CBSESkillEduction) collaborated to create the Biomechanics and Sports Class 12 Questions and Answers. All the important Information are taken from the NCERT Textbook Physical Education (048) class 12.

Contents

## Biomechanics and Sports Class 12 Questions and Answers

1. The term ‘biomechanics’ to describe the application of mechanical principles in the study of living organism was adopted in
a. early 1970s
b. late 1970s
c. 1970
d. early 1980s

a. early 1970s

2. The field where the study of forces is in focus is known as
a. dynamics
b. kinematics
c. statics
d. kinetics

d. kinetics

3. Sports biomechanics cab be described as-
a. mechanics of sports
b. kinesiology
c. physics of sports
d. sports dynamics

c. physics of sports

4. The term flexion refers to
a. bending
b. turning
c. twisting
d. straightening

a. bending

Biomechanics and Sports Class 12 Questions and Answers

5. Extension is
a. bending
b. turning
c. twisting
d. straightening

d. straightening

6. Moving away from the reference axis is known as
a. flexion
b. extension
c. abduction

c. abduction

7. Bringing closer to the reference axis is called
a. flexion
b. extension
c. abduction

8. The plane which divides the body into a left and a right is called
a. coronal plane
b. sagittal plane
c. vertical plane
d. transvers plane

b. sagittal plane

9. According to Newton’s Second Law of Motion, the greater the movement of an object, the
a. longer distance will it travel
b. stronger will it resist the external forces
c. speedier it will cover the given distance
d. more stable will it remain in its motion.

d. more stable will it remain in its motion.

Biomechanics and Sports Class 12 Questions and Answers

10. Newton’s First Law of Motion is known as the
a. Law of Reaction
b. Law of Inertia
c. Law of Effect
d. Law of Momentum

b. Law of Inertia

11. Newton’s Second Law of Motion is also known as
a. Law of Reaction
b. Law of Inertia
c. Resultant Force
d. Law of Effect

c. Resultant Force

12. Acceleration due to an external force acting on a moving object is technically defined as change in that object’s
a. location
b. direction
c. velocity
d. movement

c. velocity

13. The Friction force acts in a/an ______direction to the direction of motion of an object.
a. opposite
b. same
c. downwards
d. diagonal

a. opposite

14. Among the following sports, in which friction plays the least important role?
a. Car Race
b. Football
c. Hockey
d. Ice Skating

d. Ice Skating

Biomechanics and Sports Class 12 Questions and Answers

15. Friction is a ____________
a. Magnetic Force
b. Non-contact Force
c. Contact Force
d. Couple Force

c. Contact Force

16. The measurement of the amount of friction a surface will generate is called the of friction.
a. Calibration
b. Coefficient
c. Smoothness
d. Description

b. Coefficient

17. Define biomechanics.
Answer – Biomechanics for forensic procedures is the study of how the human body fails structurally when put under stress by an accident, a car accident, an aeroplane crash, a machine malfunction, or one of a variety of other occurrences like drowning or a criminal act.

18. What do you understand by the concept of sports biomechanics? Write in your own words.
Answer – The discipline of sport biomechanics explains how and why the human body moves the way it does. This term is frequently expanded to include interactions between athletes and their gear and environment in sports and exercise.

19. List the importance of sports biomechanics.
Answer – Each action is the culmination of numerous minor moves that all contribute to the achievement of a larger objective. Athletes can gain knowledge about their own movements and make the necessary adjustments to increase performance and reduce their risk of injury by using the biomechanics of sport and exercise.

Biomechanics and Sports Class 12 Questions and Answers

20. Differentiate between biomechanics and sports biomechanics.
Answer – We may learn how our muscles, bones, tendons, and ligaments cooperate to produce movement through biomechanics. It provides us with a thorough study of all sporting movements, which lowers the risk of injury and enhances athletic performance.

21. What is plane of movement?
Answer – Sagittal, frontal, and transverse planes of motion are the three types. Standing in the anatomical stance, it is best to visualise each plane as a hypothetical line or glass plate that separates the body into opposing segments. Right and left sides of the body are separated by the sagittal plane.

22. Which plane and axis is involved while we kick a football.
Answer – A vertical plane known as the “sagittal plane” separates the body’s left and right sides. This plane is used for flexion and extension movements like kicking a football, chest passes in netball, walking, jumping, and squatting.

23. Differentiate between flexion and extension.
Answer – The primary distinction between flexion and extension is that flexion involves bringing the two bones together and decreasing the angle between them, whereas extension involves increasing that angle.

24. Differentiate between abduction and adduction.
Answer – Various body motions or movements are referred to by the phrases abduction and adduction. The reverse of adduction is abduction. Abduction is the movement of limbs away from the midline of the body, such as the arms, legs, or fingers. On the other hand, adduction means bringing your limbs closer to the midline.

Biomechanics and Sports Class 12 Questions and Answers

25. What is knowledge of movement?
Answer – Studying human movement can help us understand how the brain governs and coordinates daily motions, how the body adapts physiologically, neurally, and psychologically to exercise, and how regular physical activity contributes to the prevention and management of chronic diseases.

26. List Newton’s Laws of Motion.
Answer – The Newton’s Laws are –
(1) Unless a force is acting on it, every object goes in a straight line.
(2) The acceleration of an item is inversely proportional to its mass and directly proportional to the net force applied.
(3) There is an equal and opposite reaction to every action.

27. Elucidate Newton’s Law of Inertia.
Answer – A body at rest or travelling in a straight line at a constant speed will continue to do so unless it is acted upon by a force, according to the law of inertia, often known as Newton’s first law, a physics postulate.

28. What is linear motion?
Answer – An thing moves linearly when it moves in a straight path. Simply put, “uniform” denotes a motion in which the acceleration is constant throughout. In other words, the velocity doesn’t change and is constant.

29. With the help of suitable examples, discuss the application of Newton’s Laws of Motion in sports.
Answer – Every object will remain in its condition of rest or equal motion in a straight line unless an external force acts on it, according to Newton’s First Law of Motion.

Biomechanics and Sports Class 12 Questions and Answers

30. How can Newton’s second law and third law of motion be applied in sports?
Answer – The larger player experiences a force from the smaller player pushing back on the bigger player, even if the smaller player is not attempting to do so, slowing the bigger player down, according to Newton’s Third Law of Motion, which states that for every action there is an equal and opposite reaction.

31. Define Friction.
Answer – Friction is a force that prevents two solid objects from rolling or sliding over one another. Although frictional forces, such the traction required to walk without slipping, may be advantageous, they can provide a significant amount of resistance to motion.

32. What is Air Resistance?
Answer – Air produces a force known as air resistance. When an object is travelling through the air, the force works in the opposite direction. While a sports vehicle with a streamlined design will encounter reduced air resistance and experience less drag, the automobile will be able to move more quickly than a truck with a flat front.

33. What is Limiting Friction?
Answer – When the moving force and the force opposing motion are equal, there is limited friction; any increase in the moving force will result in slippage. In spite of the area of contact, the limiting frictional force is independent of it and proportional to the normal reaction between the contacting surfaces.

34. Discuss various types of friction.
Answer – Static friction, sliding friction, rolling friction, and fluid friction are the four main categories of friction. Normal force and friction are independent of the hardness of the contacting surfaces and are directly proportional to the contacting surfaces.

Biomechanics and Sports Class 12 Questions and Answers