On the floor of the trolley is in the form of a long bo

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On the floor of the trolley is in the form of a long board, equipped with lightweight wheels. At one end of the board is a man. Its mass m1 = 60 kg, the weight of the board m2 = 20 kg. What is the speed (relative to the floor) it will move the cart, if a person goes along it at a speed (relative to the board) v = 1 m / s. Wheel weight and friction neglected.

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Task 10765. Detailed solution shorthand terms, formulas, laws used in the decision, the withdrawal of the calculation formula and the response.
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