Forces

• Newton’s first law

  If the resultant force on a stationary object is zero, the object will remain at constant velocity/stay at rest
• Newton‘s second law

  Resultant force = mass x acceleration
• Newton‘s second law in words

  An object’s accleration is directly proportional to the resultant force acting on it and inversely proportional to the mass
• Units for weight = N


  Units for gravitational field strength = N/kg
• What piece of equipment can be used got measure an object‘s weight

  A calibrated spring-balance or newton meter.