simple biomechanics

• Force


  A push or pulling action applied upon an objective
• Mass

  The quantity of matter in a body
• Acceleration


  The rate at which an object changes speed
• Forces


  • Gravity - the force that attracts a body towards the centre of the earth
  • Air resistance - the frictional force that air applies against a moving object
  • Muscular force - a push or a pull applied to an object
• Levers


  • First-class lever
  • Second-class lever
  • Third-class lever
• First-class lever


  • Effort - force supplied by muscle contractions
  • Fulcrum - joint
  • Resistance - resistance from other muscles in the next
• Second-class lever


  • Effort - force supplied by muscle contractions in the gastrocnemius
  • Fulcrum - ball of the foot and joints of the toes
  • Resistance - the weight of the body going through the foot
• Third-class lever


  • Effort- force supplied by muscle contractions in the biceps
  • Fulcrum - elbow joint
  • Resistance - the weight being lifted