A string of length $L$ and mass $M$ hangs freely from a fixed point. Then the velocity of transverse waves along the string at a distance $x$ from the free end is
A string of length $L$ and mass $M$ hangs freely from a fixed point. Then the velocity of transverse waves along the string at a distance $x$ from the free end is
- A
$\sqrt {gL} $
- B
$\sqrt {gx} $
- C
$gL$
- D
$gx$
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