Circular motion, resultant force

• An object moving in a circle at constant speed has a changing velocity. This is because the direction is constantly changing.
• An object only accelerates if there's a resultant force acting on it.
• Centripetal force

  The resultant force needed for circular orbit is called centripetal force. The centripetal force always acts towards the centre of the circle.
• Centripetal force

  The resultant force needed for circular orbit is called centripetal force. The centripetal force always acts towards the centre of the circle.
• If resultant forces in opposite direction equal 0 this means they are balanced

  • Stationary object stays Stationary
  • Moving objects continue moving on
• Resultant force

  • Forces in opposite direction cancel
  • Forces in same direction add
• Newtons 1st law says if resultant force acting on object it will accelerate and therefore change speed direction or both