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Students have a small toy whose spring can be compressed. The students compress the spring a distance x from equilibrium (equilibrium length = Lo= 0.4 m). When they release the toy, it jumps up in the air. Consider air resistance to be negligible. a. Rank the total energy of the system from largest (1) to smallest (3) for when the toy is compressed and starts on the ground, when the toy is half-way to its maximum height h, and when the toy reaches the maximum height h. You do not need to use all of the numbers if the energy is the same at two or more of the heights. (e. g., 1, 1, 2) On the ground Half-way to height h At height h b. Describe how you used conservation of energy in making your choices. Students perform an experiment with the toy to find its spring constant k. They compress the spring multiple times to the same compression x and then release the spring, measuring the height h it reaches. They affix additional mass to the toy with each trial and record the combined mass m of the toy plus the extra mass. You may assume that all of the mass is in the top portion attached to the spring. With the spring compressed a distance x=0.020 m in each trial, the students obtained the following data for different values of m. m (kg) hm) 0.030 0.333 0.045 0.222 0.060 0.167 0.075 0.133 0.090 0.111
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