You throw a ball upward from a window at a speed of 2.0 m/s. the ball accelerates at 9.8 m/s2. how fast is it moving when it hits the sidewalk 2.5 m below?
at the point where the ball stops it has speed of 0 m/s. When it continues to fall in every meter it gets 9.8 m/s so you just put this : 9.8 m/s2 x 2.5 m = 24.5 m/s
