A ball is thrown upward from the ground with an initial speed of 18.6 m/s; at the same instant, another ball is dropped from a building 14 m high. After how long will the balls be at the same height above the ground? Need Help? Read It Submit Answer 11. [4/4 Points] DETAILS Master 11 PREVIOUS ANSWERS SERPSE10 2.8.P.029.MI. ster who is in a window 3.90 m above. The second student catches the keys 1.70 s later. MY NOTES ASK YOUR TEACHER PRACTICE A