Solution of task 13.3.6 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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13.3.6
The material point moves along a curvilinear trajectory under the action of a force, the tangential component of which is F? = 0.2t2, and the normal component Fn = 8H. Determine the mass of the point if, at time t = 10 s, its acceleration is a = 0.7 m / s2. (Answer 30.8)