An apple is whirled round in a horizontal circle on the end of a string which is tied to the stalk. It is whirled faster and faster and at a certain speed the apple is torn from the stalk. The direction in which the apple flies off will be a. Along the radius away from the centre b. Along the direction of the force towards the centre. C. It will continue in its circular path d. Along a straight line tangential to the circular path.