Solution B44 D1 (Figure D1.4 condition 4) termehu Targ 89

Solution D1 B44. Conditions tasks: load D mass m, received at point A initial velocity v0 is moving in a curved pipe AVS situated in a vertical plane; pipe sections, or both inclined, or one horizontal and one inclined (Fig. D1.0 - D1.9, Table. D1). On the site AB cargo except gravity constant force Q (its direction is shown in the figures) and the power of the medium resistance R, depending on the speed v load (directed against the movement); friction load on the pipe in the area AB neglected. At the point in Georgia will not change its speed, the sun moves to the area of \u200b\u200bthe pipe, where it will operate in addition to the gravity force of friction (friction load on the tube f = 0,2) and a variable force F, whose projection Fx on the x-axis is set to table. Considering the load of the material point and knowing the distance AB = l or the time t1 the movement of cargo from point A to point B, to find the law of movement of cargo in the section BC, t. E. X = f (t), where x = BD.