PDF chapter test TRY NOW

Take a piece of thread and tie a small piece of stone at one of its ends. Rotate the stone to describe a circular path with constant speed by holding the thread at the other end. Now, release the thread and let the stone go.
 
Can you tell the direction in which the stone moves after it is released?
  
The stone moves along a . This happens because once the stone is released, it continues to it has been moving at that instant.