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Q: Free fall possible only in -
  • A. atmosphere
  • B. air
  • C. sea
  • D. vacuum
Correct Answer: Option D - Any object falls freely in a vacuum because there is no effect of friction on the object.
D. Any object falls freely in a vacuum because there is no effect of friction on the object.

Explanations:

Any object falls freely in a vacuum because there is no effect of friction on the object.