Лаг1989 задача №2.22

The body sliding down an inclined plane, wherein the angle of inclination at point 30. The body speed 0.14 m / s, and the point C, which lies below point B, the body speed of 2.57 m / s. The coefficient of friction of the body of the plane is equal to 0.1. Find length of time the body movement from point B to point C.

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