Centripetal Force

• Centripetal Force: is a net constant force which causes an object to move in a circular path, the force is always directed towards the centre

  
  

  It is always perpendicular to the linear velocity
• Centripetal Force, F = m*V2/r

  can be rearranged with V = W*r

  F = m*W2*r
• Centripetal Acceleration is always directed to the centre of rotation:

  a = V2/r

  can be rearranged as a = W2* r
• Speed of an object in circular motion is constant, does not change as net force is perpendicular(90 degrees) to the direction of motion

  therefore no change in speed
• In circular motion the linear velocity changes however linear speed is constant, this is because velocity is a vector so the magnitude of the velocity remains constant however the direction changes