Two stones, A and B, are thrown horizontally from the top of a cliff. Stone A has an initial speed of 15 m/s and stone B has an initial speed of 30.0 m/s. If you neglect air resistance, compared to the time it takes stone A to reach the ground, the time it takes stone B to reach the ground is

Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.