A stone is dropped from 80 m (g = 9.8 m/s^2). Its speed on reaching the ground is:

  1. 28 m/s
  2. 19.8 m/s
  3. 79.2 m/s
  4. 39.6 m/s
Answer

D) 39.6 m/s

v = 2gh = 2(9.8)(80) = 39.6 m/s. SLO P-11-B-04 · Application

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