I have a big confusion. There is a question in my book which basically says that a ball is tied to a string and rotated. and it asks me to tell whether the following statement is true of false. Direction of radial acceleration MAY remain the same. This statement is true. Please explain to me a case where this is possible. I think that this is only when an object moves straight and in circular motion i think radial acceleration is always towards the centre. Is it that the frame of reference is different or is it something else?