Question
Old-fashioned pocket watches needed to be wound daily so they wouldn’t run down and lose time, due to the friction in the internal components. This required a large number of turns of the winding key, but not much force per turn, and it was possible to overwind and break the watch. How was the energy stored?
(a) A small mass raised a long distance
(b) A large mass raised a short distance
(c) A weak spring deformed a long way
(d) A strong spring deformed a short way
Final Answer
(c)
Solution video
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Video Transcript
This is College Physics Answers with Shaun Dychko. Since the watch requires a large number of turns that means that the spring is going to be deformed a long way and since it's possible to break the watch spring, that means that the spring must be weak. So the answer is C.
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