pty1016 kinematics
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pty1016 kinematics

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Questions and Answers

What aspect of human and chimpanzee throwing behavior differs primarily due to shoulder orientation?

  • Knee flexion
  • Hip extension
  • Arm abduction (correct)
  • Wrist rotation

    • What is the primary muscle affected by the alignment of the humerus during throwing?

  • Trapezius
  • Deltoid
  • Pectoralis major (correct)
  • Latissimus dorsi

    • Maximizing inertia during shoulder flexion is achieved through which action?

  • Rotating the shoulder joint
  • Aligning the humerus with the Pectoralis major (correct)
  • Extending the elbow
  • Elevating the shoulder blade

    • What complementary action contributes to loading the elastic ligaments in the shoulder during throwing?

    <p>Elbow flexion</p> Signup and view all the answers

    In the context of throwing mechanics, how does the alignment of the humerus impact performance?

    <p>Enhances shoulder flexion torque</p> Signup and view all the answers

    Which factor plays a crucial role in the differences observed in throwing performance between humans and chimpanzees?

    <p>Configuration of the shoulder joints</p> Signup and view all the answers

    What impact does shoulder orientation have on the throwing mechanics of both species?

    <p>Modifies the line of action of shoulder muscles</p> Signup and view all the answers

    Which physiological aspect is maximized by aligning the arm correctly during the throwing motion?

    <p>Inertia to shoulder flexion torque</p> Signup and view all the answers

    What is the primary focus of biomechanics?

    <p>Analyzing mechanical principles related to human movement</p> Signup and view all the answers

    Which of the following is NOT a sub-branch of biomechanics?

    <p>Thermodynamics</p> Signup and view all the answers

    Which professional would most likely apply the principles of biomechanics in their work?

    <p>Orthopaedic surgeon</p> Signup and view all the answers

    In the context of biomechanics, what does kinematics specifically study?

    <p>Time and spatial factors of motion</p> Signup and view all the answers

    What does the term 'dynamics' refer to in biomechanics?

    <p>Study of systems subject to acceleration</p> Signup and view all the answers

    Which of the following considerations is directly related to the application of biomechanics in healthcare?

    <p>Guiding treatment decisions based on mechanical principles</p> Signup and view all the answers

    Which component of shoulder morphology is specifically linked to reconstructing hominin shoulder orientation?

    <p>Scapula orientation</p> Signup and view all the answers

    What can elastic energy storage in the shoulder allow for in terms of human movement?

    <p>Improved high-speed throwing abilities</p> Signup and view all the answers

    What does kinematics study primarily focus on?

    <p>The dimensions, order, and timing of movements</p> Signup and view all the answers

    Which of the following best describes kinetics?

    <p>The study of both internal and external forces affecting motion</p> Signup and view all the answers

    How is the kinematics of a sport skill commonly referred to?

    <p>Form or technique</p> Signup and view all the answers

    What is implied when discussing the resultant muscle force in the context of kinetics?

    <p>It encompasses both internal muscle and external forces.</p> Signup and view all the answers

    In a free body diagram of the shank-and-foot at heel contact, which force is not represented?

    <p>The muscle force generated by the calf</p> Signup and view all the answers

    What does the kinematics study exclude from its analysis?

    <p>Muscle contraction strength</p> Signup and view all the answers

    What reference frame is established when analyzing joint reaction force?

    <p>An X-Y coordinate reference frame</p> Signup and view all the answers

    Which term best describes the forces exerted by the ground during motion?

    <p>Ground reaction forces</p> Signup and view all the answers

    What is primarily assessed by kinematics in human movement analysis?

    <p>The speed and distance of the movement</p> Signup and view all the answers

    Which of the following is an example of qualitative data in a sports performance assessment?

    <p>Observations of an athlete's agility and skillfulness</p> Signup and view all the answers

    What technique relies on descriptive observations to provide insights in biomechanics?

    <p>Qualitative observation</p> Signup and view all the answers

    Which tool captures movement at 30 frames per second for analysis?

    <p>Videography</p> Signup and view all the answers

    Which kinesthetic quantity does not fall under the domain of kinematics?

    <p>Torque</p> Signup and view all the answers

    What is one advantage of using motion monitoring systems in biomechanical research?

    <p>They enable real-time tracking of movements</p> Signup and view all the answers

    Which of the following best defines kinetics in the context of biomechanics?

    <p>Analysis of forces and torques during movement</p> Signup and view all the answers

    What is typically the focus of biomechanical researchers compared to physiotherapists?

    <p>Quantitative analysis of motion mechanics</p> Signup and view all the answers

    What is the main focus of kinematics in the study of human movement?

    <p>The geometry and patterns of motion</p> Signup and view all the answers

    In biomechanics, which type of motion involves all parts of the body moving in the same direction at the same speed?

    <p>Translatory motion</p> Signup and view all the answers

    What is the purpose of a goniometer in the context of human movement analysis?

    <p>To quantify angles of joint movement</p> Signup and view all the answers

    Which of the following is NOT a characteristic of linear motion?

    <p>Involves rotation around a central axis</p> Signup and view all the answers

    What role does the Cartesian coordinate system play in biomechanics?

    <p>It standardizes the measurement of movements</p> Signup and view all the answers

    Which term describes motion along a straight line?

    <p>Rectilinear motion</p> Signup and view all the answers

    What is the primary difference between kinematics and kinetics in the study of movement?

    <p>Kinematics studies patterns and forms of motion, while kinetics studies the forces involved.</p> Signup and view all the answers

    Which of the following statements accurately describes angular motion?

    <p>It involves movement around a central axis of rotation.</p> Signup and view all the answers

    Study Notes

    Biomechanics

    • Investigates the mechanical principles of how human movement works
    • Applied to analyzing human movement
    • Applicable to address problems related to human health, healthcare and performance
    • Informs treatment decisions and injury mechanisms
    • Applied by many fields (physiotherapists, podiatrists, biomedical engineers, personal trainers, coaches, orthopaedic surgeons)

    Sub-Branches of Biomechanics

    • Statics: study of systems in constant motion, including zero motion
    • Dynamics: study of systems subject to acceleration

    Kinematics

    • Study of the appearance or description of motion
    • Focuses on the time and spatial factors of motion
    • The kinematics of an exercise or a sport skill is known as form or technique
    • Visual observation of a body in motion

    Kinetics

    • Study of the forces that influence a body's movement
    • Forces include internal forces (muscle forces) and external forces (gravity, forces exchanged by external objects)

    Kinematics vs Kinetics

    • Kinematics: distance, displacement, speed, velocity, acceleration/deceleration
    • Kinetics: force, pressure, torque, work, impulse, momentum, power

    Qualitative vs Quantitative Data

    • Qualitative: Descriptive (ex: strong, skillful, agile, flexible, fast)
    • Quantitative: Measured data (ex: running speed = 5 m/s, height = 1.75 m, mass = 68.2 kg)

    How to Quantitatively Measure Movement

    • Videography
    • Movement Monitoring Systems
    • Goniometer
    • Force plates
    • Electromyography

    Kinematics and Kinetics of Movement

    • Kinematics: study of the geometry, pattern or form of motion with respect to time, not concerned with forces
    • Kinetics: study of the forces associated with the motion

    Forms of Motion

    • Linear Motion: motion along a line, with all parts of the body moving in the same direction at the same speed, also called translational motion
      • Rectilinear - movement along a straight line
      • Curvilinear - movement along a curved line
    • Angular Motion: rotation around an axis, perpendicular to the plane where the rotation occurs

    Spatial Reference Systems

    • Used to standardize measurements
    • Cartesian Coordinate System: most common system

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    Related Documents

    PTY1016 Biomechanics (Kinematics) PDF

    Description

    Test your knowledge on the mechanical principles of human movement with this quiz on biomechanics. Explore the sub-branches such as statics and dynamics, and learn about kinematics and kinetics. Perfect for students and professionals in health and sports sciences.

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