A spring of spring constant 200 N/m is stretched by 0.1 m. How much elastic potential energy does it store?

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A ball is thrown vertically upward at 28 m/s. Taking $g = 9.8$ m/s $^{2}$ and ignoring air resistance, what is the maximum height reached above…
A ball is thrown vertically upward at 7 m/s. Taking $g = 9.8$ m/s $^{2}$ and ignoring air resistance, what is the maximum height reached above…
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