Biomechanics
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Questions and Answers

Which principle of angular kinetics is related to gravity?

  • Principle of conservation of angular momentum
  • Angular momentum
  • Balance point
  • Kinetic link principle (correct)

    • What is the center of gravity?

  • The point at which the weight force is zero
  • The point at which the weight force is greatest
  • The point at which the weight force is smallest
  • The point at which the weight force is equal on either side (correct)

    • How does the center of gravity change if the body's position is changed?

  • It moves towards the lower body
  • It moves towards the upper body (correct)
  • It remains the same
  • It moves randomly

    • What is the quantity of motion that a rotating object possesses?

    <p>Angular momentum</p> Signup and view all the answers

    What are the components of angular momentum?

    <p>Mass and velocity</p> Signup and view all the answers

    What is the rotary equivalent of Newton's 1st law of inertia?

    <p>Principle of conservation of angular momentum</p> Signup and view all the answers

    What causes an equal and opposite reaction elsewhere in the body?

    <p>Muscular action</p> Signup and view all the answers

    What is the work done when a resistance is moved over a certain distance?

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

    What is the resistance to movement called?

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

    What is the desire of an object to continue doing whatever it's doing called?

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

    Which factor influences linear motion by decelerating the object on the way up and accelerating it on the way down?

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

    What does inertia refer to?

    <p>The resistance to changing the state of motion</p> Signup and view all the answers

    Which equation represents Newton's second law of motion?

    <p>$F = m \times a$</p> Signup and view all the answers

    What is the relationship between body mass and muscular force needed?

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

    What is the formula for momentum?

    <p>$M = m \times v$</p> Signup and view all the answers

    What is impulse?

    <p>The applied force over a certain period of time</p> Signup and view all the answers

    What is the relationship between the area of impact and the force in landing?

    <p>Direct relationship</p> Signup and view all the answers

    What is the formula for calculating running velocity?

    <p>$V = l \times s$</p> Signup and view all the answers

    What is the stance phase in walking/running stages?

    <p>The phase where the foot makes contact with the ground</p> Signup and view all the answers

    What does angular velocity describe?

    <p>The rate of spin of an object/athlete</p> Signup and view all the answers

    Which chapter covers linear motion in sport?

    <p>Chapter 4</p> Signup and view all the answers

    What is the difference between speed and velocity?

    <p>Speed measures how fast an object is traveling, while velocity measures the change in position over time.</p> Signup and view all the answers

    When can velocity and speed be the same?

    <p>When the direction of movement is in a straight and consistent line.</p> Signup and view all the answers

    What is acceleration/deceleration?

    <p>The rate at which the velocity (or speed) changes.</p> Signup and view all the answers

    What is needed to hold an object stationary or make it move?

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

    What is the formula for speed?

    <p>$Speed = \frac{\text{distance}}{\text{time}}$</p> Signup and view all the answers

    What is the formula for velocity?

    <p>$Velocity = \frac{\text{distance}}{\text{time}}$</p> Signup and view all the answers

    What is the formula for acceleration?

    <p>$Acceleration = \frac{\text{velocity}}{\text{time}}$</p> Signup and view all the answers

    What is the formula for deceleration?

    <p>$Deceleration = \frac{\text{velocity}}{\text{time}}$</p> Signup and view all the answers

    What quantity does velocity have that speed does not?

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

    Study Notes

    Angular Kinetics and Gravity

    • The center of gravity is the point where the weight of the body can be considered to be acting.
    • The center of gravity changes if the body's position is changed.

    Angular Momentum and Rotary Motion

    • Angular momentum is the quantity of motion that a rotating object possesses.
    • The components of angular momentum are mass, velocity, and radius of rotation.
    • The rotary equivalent of Newton's 1st law of inertia is that an object at rest will remain at rest, and an object in motion will continue to move in a circular path, unless acted upon by an external torque.

    Forces and Motion

    • An equal and opposite reaction elsewhere in the body is caused by Newton's 3rd law of motion.
    • The work done when a resistance is moved over a certain distance is force × distance.
    • Resistance to movement is called friction.
    • The desire of an object to continue doing whatever it's doing is called inertia.

    Linear Motion and Inertia

    • Gravity is a factor that influences linear motion by decelerating the object on the way up and accelerating it on the way down.
    • Inertia refers to the tendency of an object to maintain its state of motion.
    • Newton's second law of motion is represented by the equation F = ma (force = mass × acceleration).
    • The relationship between body mass and muscular force needed is that a larger mass requires a greater muscular force to produce a given acceleration.

    Momentum and Impulse

    • The formula for momentum is p = mv (momentum = mass × velocity).
    • Impulse is the change in momentum of an object.
    • The relationship between the area of impact and the force in landing is that a smaller area of impact results in a greater force.

    Running and Walking

    • The formula for calculating running velocity is v = d/t (velocity = distance ÷ time).
    • The stance phase is one of the stages in walking and running.

    Angular Velocity and Motion

    • Angular velocity describes the rate of change of angular displacement.
    • Chapter 5 covers linear motion in sport.

    Speed and Velocity

    • The difference between speed and velocity is that speed is a scalar quantity, while velocity is a vector quantity.
    • Velocity and speed can be the same when the object is moving in a straight line.
    • Acceleration/deceleration is the rate of change of velocity.
    • A force is needed to hold an object stationary or make it move.

    Formulas

    • The formula for speed is v = d/t (speed = distance ÷ time).
    • The formula for velocity is v = Δx/Δt (velocity = change in displacement ÷ time).
    • The formula for acceleration is a = Δv/Δt (acceleration = change in velocity ÷ time).
    • The formula for deceleration is a = -Δv/Δt (deceleration = -change in velocity ÷ time).
    • Velocity has direction, which speed does not.

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    Sport Biomechanics (SB).docx

    Description

    Test your knowledge of applied sport mechanics with this quiz. Covering topics such as linear motion, linear kinetics, angular motion, angular kinetics, sport kinetics, lectures, kinematics, and kinetics, this quiz will challenge your understanding of the mechanical principles in common types of sports movements.

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