A person sitting in a running train throws a ball vertically upwards. What is the nature of the path described by the ball to a person?
(i) Sitting inside the train
(ii) Standing on the ground outside the train
(i) The nature of the path will be vertical straight because the ball has only one velocity acting vertically.
(ii) The nature of the path will be a parabolic path because the ball has the vertical as well as horizontal component of velocities