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# Find Spring Constant

APPH12-4LGDBY

A certain spring is hung vertically, and its length is 20 cm. When a 5 kg mass is hung from the spring, its length is now measured to be 30 cm.

Which one of the following is closest to the spring constant of this spring?

A

$50\quad { N }/{ m }$

B

$167\quad { N }/{ m }$

C

$250\quad { N }/{ m }$

D

$500\quad { N }/{ m }$