A free fall in true sense occurs only ______.
A
:
In the sea
B
:
In the atmosphere
C
:
In air
D
:
In vacuum
General Science
Physics
Motion
Answer
Option 4 : In vacuum
Explanation
A free fall in true sense occurs only in a vacuum.
- A fall is considered as a free fall if only force acting on it was gravity.
- As the vacuum contains no matter, there is no opposite force against the free fall due to gravity.
- In air and atmosphere, there is aerodynamic drag and in the sea, there is a buoyancy force of water to oppose the movement due to gravity.