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Physics
Physics
Problem
The escape velocity for a planet is
v
e
v_e
v
e
. A tunnel is dug along a diameter of the planet and a small body is dropped into it from the surface. When the body reaches the centre of the planet, its speed will be: (A)
v
e
v_e
v
e
(B)
v
e
2
\frac{v_e}{\sqrt{2}}
2
v
e
(C)
v
e
2
\frac{v_e}{2}
2
v
e
(D) Zero
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