Solution of task 13.3.4 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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13.3.4
Within a smooth tube curved along a circle of radius R = 2 m, in a horizontal plane a material point with mass m = 42 kg moves under the action of the force F = 21 N from the rest state. Determine the horizontal component of the reaction of the tube at time t = 7 s, if the direction Force coincides with the velocity vector. (Answer 257)