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If it takes an object 3s to fall freely to the ground from a certain height, what is ...

If it takes an object 3s to fall freely to the ground from a certain height, what is the distance covered by the object?
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  • A 90 m
  • B 30 m
  • C 45 m
  • D 60 m
Correct Answer: Option C
Explanation:
S = (1)/2gt2
S = (1)/2 x (10)/1 x 32 =5 x 9 = 45 m

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