MOTION IN A CIRCLE

MOTION IN A CIRCLE

1. UNIFORM CIRCULAR MOTON

   • Objects moving in circular motion clearly aren't going in a straight line so the forces can't be balanced. There is a resultant force. This is called the centripetal force.
     • CENTRIPETAL FORCE ACTS TOWARDS THE CENTRE OF THE CIRCLE.

2. CENTRIPETAL ACCELERATION

   • OBJECTS TRAVELLING IN CIRCLES ARE ACCELERATING SINCE THEIR VELOCITY IS CHANGING, THIS IS BECAUSE VELOCITY IS A VECTOR, WHEN OBJECTS TRAVEL IN CIRCLES, THEY ARE CHANGING THEIR DIRECTION.
   • RESULTANT FORCE THAT CAUSES CIRCULAR MOTION IS CALLED THE CENTRIPETAL FORCE.
     • CENTRIPETAL FORCE DOES NO WORK ON OBJECTS
       • THE CENTRIPETAL FORCE IS PERPENDICULAR TO THE DIRECTION OF THE OBJECT'S VELOCITY. THEREFORE, NO WORK IS DONE BY THE CENTRIPETAL FORCE BECAUSE THERE IS NO DISPLACEMENT IN THE DIRECTION OF THE FORCE. THE Ek IS CONSTANT , SO THE OBJECT'S SPEED IS UNCHANGED.