biomechanics

    Cards (43)

    • What are the components of a lever?
      • Fulcrum
      • Resistance
      • Effort
    • What are the three classes of levers?
      1. Class 1 lever
      2. Class 2 lever
      3. Class 3 lever
    • Where does a Class 2 lever occur?
      At the ankle during plantar flexion
    • Where does a Class 3 lever occur?
      At the elbow during bicep curls
    • What are the mechanical advantages and disadvantages of levers?
      • Mechanical advantage: Support arm longer than resistance arm
      • Mechanical disadvantage: Resistance arm longer than support arm
    • What are the advantages and disadvantages of a Class 2 lever?
      Advantages:
      • Move heavy loads with less force
      Disadvantages:
      • Limited range of motion
    • What are the advantages and disadvantages of a Class 3 lever?
      Advantages:
      • Large range of movement
      Disadvantages:
      • Requires more force
    • What is Newton's 1st law of motion?
      An object remains at rest or in motion unless a force acts upon it
    • What does inertia refer to?
      Resistance of an object to change motion
    • What is Newton's 2nd law of motion?
      An objects amount of acceleration will be in proportion to the size of the force causing it and in the direction of the force
    • How is force calculated according to Newton's 2nd law?
      Force = mass * acceleration
    • What is Newton's 3rd law of motion?
      For every action, there is an equal and opposite reaction
    • What is the ground reaction force?
      Force exerted opposite to muscular force
    • Where is the human's center of mass located?
      Around the belly button
    • What happens to the center of mass when arms are raised?
      It rises along with the arms
    • What happens to the center of mass when squatting?
      It lowers as the body squats
    • What is stability in biomechanics?
      The ability to resist motion and remain at rest
    • What factors affect stability?
      • Mass of the body
      • Height of the center of mass
      • Base of support
      • Line of gravity
    • What are scalar quantities?
      Measurements described by size only
    • What are vector quantities?
      Measurements described by size and direction
    • How are vectors represented?
      By arrows indicating magnitude and direction
    • What is mass?
      Quantity of matter in a body
    • What is weight?
      Force on a given mass due to gravity
    • How is weight measured?
      In newtons (N)
    • How is mass measured?
      In kilograms (kg)
    • What is the difference between distance and displacement?
      Distance is scalar; displacement is vector
    • How is distance measured?
      In meters (m)
    • How is displacement measured?
      In meters (m)
    • What is speed?
      Rate of change of distance
    • What is velocity?
      Rate of change of displacement
    • How is speed measured?
      In meters per second (m/s)
    • How is velocity measured?
      In meters per second (m/s)
    • What is momentum?
      Quantity of motion possessed by a moving body
    • How is momentum calculated?
      Momentum = mass * velocity
    • What is the unit of momentum?
      Kilogram meter per second (kgm/s)
    • What is acceleration?
      Rate of change in velocity
    • How is acceleration measured?
      In meters per second squared (m/s²)
    • How is acceleration calculated?
      Acceleration = change in velocity / time
    • What is the formula for change in velocity?
      Change in velocity = final - initial velocity
    • What are the key concepts in linear motion?
      • Scalar quantities: mass, distance, speed
      • Vector quantities: weight, acceleration, displacement, velocity, momentum
    See similar decks