1) If a rock is dropped from the top of a tall building, how fast will it be going after 3.0 seconds? 5) From the top of a cliff, a ball is thrown downward with a velocity of -15 m/s, how far down will it have gone after 2.5 seconds? 6) How fast will a falling ball be going after 2.5 seconds, if it has an initial velocity of -15 m/s?