Two people stand on different floors of an outside stairway. One is 6 m above the ground and the other is 12m above the ground. The person on the lower floor throws a ball upward with a speed of 15m/s and the other person just drops hers. Ignoring air resistance, which ball hits the ground at a higher speed?  a.)They both hit the ground with the same speed b.) The one thrown upward  c.) The one that is dropped

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