formulas

• speed 


  distance / time
• force = mass x acceleration
• displacement


  d/t (remember displacement) (final position - initial)
• acceleration


  Δv/t
• Force due to gravity

  Fg= mg

  (mass) (gravity = 9.8)
• net force


  Fnet= ma (acceleration)

  acceleration= fnet/m
• Work done


  when force makes something move

  w= ΔE

  or

  Work = Force × Distance

  
• Gravitational potential energy


  the potential stored energy a object has due to height

  Eg= mgh
• kinetic energy


  Ek= 1/2 m v2
• efficiency


  A measure of how well a system performs its intended function with the least amount of waste or energy loss.

  fraction of energy that is useful

   Output ÷ Input x 100
• Newtons first law- inertia

  an object will stay at rest unless an unbalanced force acts on it

  and object will continue moving unless and unbalanced force acts on it
• newtons second law - acceleration


  acceleration depends on the size of netforce and mass

  
  

  f = m x a
• Newtons third law


  for every action, there is an opposite and equal reaction
• newtons 3 laws


  first 2 laws, forces acting on a single object, effect

  last law is 2 objects w force