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20 March, 06:17

An object is dropped on Earth from a height of 15 m. How long did it take for the object to reach the ground?

A) 1.2 seconds

B) 1.5 seconds

C) 1.8 seconds

D) 3.0 seconds

+5
Answers (1)
  1. 20 March, 06:39
    0
    x=gt^2/2=>t^2=2x/g=30/9.81=3.05=>t=sqrt (3.05) = 1.8 s
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