B) Here are four different distance-time (d-t) graphs. In one of them, the cart does not move. In the other three, the more time that elapses, the further the cart has gone. One graph shows that
the cart travels at a constant speed. In another, the cart travels faster at the beginning. In
another one, the cart travels fastest at the end. Identify which graph corresponds to which
motion. (Hint: Compare the distance traveled in the first few seconds of the trip with the distance
traveled in the last few seconds of the trip.)