forces

• Newton's first law

  • unless an unbalanced force acts on the object
  • an object at rest will remain at rest
  • an object moving with constant velocity will continue to move at constant velocity
• Newton's second law

  Force = mass x acceleration
• Newton's third law

  • for every action there is an equal and opposite reaction
• you can find the resultant of two force vectors by adding the vectors
• weight = mass x gravity (9.8)