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27 Nov 2019

A certain coiled wire with uneven windings has the property that tostretch it an amount s from its relaxed length requires a forcethat is given by , so its behavior is different from a normalspring. You suspend this device vertically, and its unstretchedlength is 19.0 cm. You hang a mass of 17.0 grams from the device,and you observe that the length is now 21.0 cm. What is b? (Startyour analysis from the Momentum Principle.)

You hold the 17.0 gram mass and throw it downward, releasing itwhen the length of the spring-like device is 24.0 cm and the speedof the mass is 5.40 m/s. One millisecond later, what is theapproximate change in the speed of the mass?


At this same time, one millisecond after throwing, what is theapproximate change in the stretch of the device

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