Лаг1989 задача №2.23

Body allowed a small upward along the inclined plane 30 at an angle with the horizon, with an initial velocity of 10 m / s. The coefficient of friction of 0.1. Find: a) speed of the body during its return to the starting point; b) raising the height of the body; c) the time interval comprising the lifting body and return to the starting point.

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