Kinematics

• Kinetics forces action on body
• Displacement is motion of a body or segment that occurs when force is applied
• Force is a push or pull that produces displacement
• Equilibrium forces are equal
• Applied Force: Quantity & Direction
• Linear forces are applied
• Motion: one point to another
• Types of motion: linear/rotary
• Location: Axis/Plane
• Magnitude: distance of displacement
• Direction: depends on the axis and plane
• Rate: how fast a body segment moves
• (Types of motion)

  Body: bones and joints
• (Types of motion)

  Translatory: linear displacement
• (Types of motion)

  Body 3D: moves in 3 axis, 3 planes of motion
• (Types of motion)

  Linear: metres
• (Types of motion)

  Rotary: degrees
• (Types of motion)

  X-axis (sagittal): med-lat
• (Types of motion)

  Y-axis: Vertical
• (Types of motion)

  Z-axis- AP
• Velocity: rate body segment
• Acceleration: rate at which a change in velocity occurs
• Linear motion: meters
• Torque: motion occurring around an axis
• (types of forces)

  Gravity: weight
• (types of forces)

  Muscles: passive stretching
• (types of forces)

  Stretching: resistance to movement between two objects that are in contact with each other
• (types of forces)

  External Applied Resistance: whatever the muscles must work against to produce motion
• (types of forces)

  Moment: the result of force acting at a distance from the point of motion, or the axis
• First law of motion: Inertia

  If a body is at rest, it will remain at rest, if a body is in uniform motion, it will remain in motion, until an outside force acts upon it
• Acceleration: the bigger the object, the slower for motion that will take place
• Action-Reaction: for every action force there is an equal and opposite reaction
• A simple machine that consists of a rigid bar that rotates around the axis, or fulcrum, is a lever.