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A Block Is Attached to the End of an Ideal

Question 60

Multiple Choice

A block is attached to the end of an ideal spring and moved from coordinate xi to coordinate xf.The relaxed position is at x = 0.The work done by spring is positive if:


A) xi = 2 cm and xf = 4 cm
B) xi = -2 cm and xf = 4 cm
C) xi = -2 cm and xf = -4 cm
D) xi = 2 cm and xf = -4 cm
E) xi = -4 cm and xf = -2 cm

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