An Ideal Spring Is Hung Vertically from the Ceiling

question 6

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 the block is being extended 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