Solution of task 13.4.12 from the collection of Kepe OE

If the total amount of your purchases from the seller Михаил_Перович more than:
- 200 $ the discount is 15%
- 100 $ the discount is 10%
- 50 $ the discount is 7%
- 20 $ the discount is 5%
- 10 $ the discount is 3%
- 5 $ the discount is 2%
- 1 $ the discount is 1%

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13.4.12
The body suspended from the spring performs free vertical vibrations, given by the graph of the function y = y (t). Determine the mass of the body if the spring stiffness coefficient is c = 300 N / m. (Response 122)