if graph of velocity v and time t for a particle moving along straight line is parabola symmetric about time axis, then the relation between acceleration a and time t for particle is …. ? (Divya posted this question)

## Path of an object

If a man tossed a coin in a moving train and the coin fell back . Then in which type of motion train is moving? and how? CHANDRIMA Answer For the person who tosses the coin the motion is vertically upward if he do so. But for an observer outside the train the path of the [...]