An Ideal Spring Is Attached to the Ceiling

An ideal spring is attached to the ceiling.Without anything attached to the bottom of the spring,the bottom of the spring is 40 cm below the ceiling.When a 3.0 kg mass is attached to the bottom of the spring,the bottom of the spring (at rest) is 65 cm below the ceiling.What is the spring constant of the spring?

A) 29 N/m
B) 45 N/m
C) 74 N/m
D) 120 N/m
E) 940 N/m

Correct Answer:

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