Spider silk is one of the most remarkable elastic materials known. Consider a si

Question

Spider silk is one of the most remarkable elastic materials known. Consider a silk strand suspended vertically with a 0.35-g fly stuck on the end. With the fly attached, the silk measures 28.0 cm in length. The resident spider, of mass 0.66 g, senses the fly and climbs down the silk to investigate. With both spider and fly at the bottom, the silk measures 37.5 cm.

Part A: Find the spring constant of the silk. (Express your answer to two significant figures and include the appropriate units)

Part B: Find the equilibrium length of the silk. (Express your answer to two significant figures and include the appropriate units)

Explanation / Answer

The silk thread stretches by an additional (37.5 - 28.0 cm) = 9.5 cm with the addition of .66g Spring constant = 14.4 cm/g Equilibrium length of the thread would be *without* the 0.35g fly 28.0 cm - (14.4 *0.35) = 28.0 - 5.04 = 22.96 cm

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