Solution of task 8.4.7 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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8.4.7
The gear 1 rotates according to the law? 1 = 4t2.
Determine the acceleration of the rail 3, if the radii of the gears R1 = 0.8 m, r2 = 0.4 m (Answer 6.4)