The escape velocity from a planet is $V_e.$ A tunnel is dug along the diameter of the planet and a small body dropped into it. The speed of the body at the centre of the planet will be
The escape velocity from a planet is $V_e.$ A tunnel is dug along the diameter of the planet and a small body dropped into it. The speed of the body at the centre of the planet will be
- A
$\frac {V_e}{\sqrt 2}$
- B
$\frac {V_e}{2}$
- C
$V_e$
- D
$2V_e$
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