An Ideal Spring Is Hung Vertically from the Ceiling

question 46

Multiple Choice

An ideal spring is hung vertically from the ceiling.When a 2.0-kg mass hangs at rest from it, the spring is extended 6.0 cm from its relaxed length.An upward external force is then applied to the block to move it upward a distance of 16 cm.While the block is being raised by the force, the work done by the spring is

• A)-1.0 J
• B)-0.52 J
• C)-0.26 J
• D)0.52 J
• E)1.0 J

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