Тарг С.М. 1989 К2 вариант 20

The mechanism consists of stepped wheels meshed or connected by a belt drive, a gear rack 4 and a weight 5 tied to the end of a thread wound on the bottom of the wheels. Determine the speed and acceleration at time t=2s.
Given: S₄=4(7t-t²); R₁=4 cm; r₁=2 cm; R₂=8 cm; r₂=6 cm; R₃=12 cm; r₃=12 cm; Find: Vв; Vᴄ; ε₂;aᴀ; a₅.

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