SAC 1 Part A

• define newtons 1st law of gravity. (inertia) 


  “ an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction, unless acted upon by an unbalanced force “
• Define Newton’s 2nd Law Of Motion

  Newton‘s second law states that

  F = ma or,

  to put into words

  FORCE = MASS x ACCELERATION
• Define Newtons 3rd Law Of Motion

  ”For every action there is an equal and opposite reaction“
• Displacement 


  The measurement of how far you finish from the start position in a set direction.
• angular motion 


  takes place when a body moves along a circular path
• Speed

  Rates of motion (distance/time)

  speed = length of path ÷ time
• Velocity

  Speed in any given direction
• Open skills

  Where the performer is required to have flexibility and adaption to changing environment or time, pressure.
• Describe linear motion

  Motion that takes place through linear pathway, either in a curve line or straight line.
• Describe rotational motion  (angular) 


  Takes place when an object turns about an axis of rotation
• Name 3 points of an axis 

  1. Medial axis - naval to lower back
  2. Longitudinal axis - head to toe vertically
  3. Horizontal axis - hip to hip
• What is rolling friction? give an example 

  When one object rolls along another surface

  E.g lawn bowls 
• What is sliding friction? give an example 

  Friction with sliding object

  E.g skim boarding, dolphin diving in volleyball 
• What is static friction? Give an example 


  Friction between two objects that are not moving

  E.g golf ball on a tee
• What is general motion?

  A combination of linear and angular motion 
• What is static friction? Give an example 


  Friction between two objects that are not moving E.g golf ball on a tee
• Stability - static and dynamic 


  Static is Stationary

  Dynamic is Moving
• What is fluid friction? Give an example


  Friction caused by water/air

  E.g platform diving
• What is a projectile? Give an example 


  An object that is thrown or launched into the air and is only acted upon by gravity.

  E.g basketball being shot in the hoop
• What is a first-class lever? Give an example


  One where the axis is located in the middle, with force + resistance on either side

  F-A-R

  E.g seesaw
• What is a second-class lever? Give and example

  The axis is located at the end with resistance in the middle force at the other end.

  F-R-A

  E.g wheelbarrow
• What is a third-class lever? Give an example

  The axis is located at one end with force in the middle and resistance at the other end.

  R-F-A

  E.g bicep curl
• What is trajectory?


  The path of a projectile.
• Define balance

  The ability to neutralise forces that disturb equilibrium
• Centre of gravity

  can be located outside the body. The point where the entire mass is concentrated
• Line of gravity 


  The vertical line passing down through the centre of gravity

  The vertical
• What is a fine motor skill? Give an example 


  The movement of small muscle groups resulting more precise movement

  E.g writing, typing, playing guitar, doing skincare,
• What is gross motor skills? Give an example

  Involves using the large muscles of the body for activities.

  E.g running, jumping, throwing
• What is a locomotive skill? Give an example

  A fundamental movement skill

  E.g running, hopping, jumping
• What is body control?

  Balancing, tumbling, climbing
• Discrete skills

  Having a clear beginning and end

  Getting from A-B

  E.g backflip, front flip, shooting a basketball
• Serial skills - many skills


  Made up of a number of discrete skills that are put together in a certain order.

  E.g floor routine for gymnastics, - round off - back handspring - backflip
• Continuous skills

  Do not have a clear beginning or ending and it is impossible to define exactly where is stops.

  E.g running, jogging, cycling,
• What is the angular acceleration formula?

  Acceleration - final velocity - initial velocity ÷ time

  (a = wf - wi / t)
• What is object control?

  kicking, throwing, catching
• What are aquatic skills? (water)

  Floating, swimming skills, diving strokes.
• Velocity

  Velocity = Displacement ÷ time

  (v = d / t)
• What are task constraints? 


  Related to the complexity and demands of the task.
• What are individual constraints?

  Relayed to the characteristics of the learner.
• What are environmental constraints?

  Refers to the learning environment structure of practise and feedback provided to the learner