Solution of task 20.2.1 from the collection of Kepe OE

If the total amount of your purchases from the seller Михаил_Перович more than:
- 16570 ₽ the discount is 15%
- 8285 ₽ the discount is 10%
- 4142 ₽ the discount is 7%
- 1657 ₽ the discount is 5%
- 828 ₽ the discount is 3%
- 414 ₽ the discount is 2%
- 83 ₽ the discount is 1%

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20.2.1
The potential energy of the mechanical system is P = 15? 2, where y is rad. Identify
The generalized force corresponding to the generalized coordinate? At the time when the angle
? = 90 °. (Answer -47.1)