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Solving a class of problems conveyor belt should be noted that several aspects

Just put the parts on the conveyor belt, at first there is a process accelerated by the sliding friction force, when the rate increased with the conveyor speed are equal, the object and no relative motion between the conveyor belt, friction from the one zero g mutation,[link widoczny dla zalogowanych], then the speed port has completed the remaining distance. (Continued from page 31) Note: The (Answer according to Wu Xu) 87. Q: Let mouth> 6> c> O, n ∈ N and n ≥ 2, verify: - a _. (Hebei Shahe one sophomore (4) Class Zhang Kai) Answer: A, one B, one c,-D, then a = A a, b ---- tP, mouth of a c-c, l, 6 a c = 13 A> B> O, C> ? O, A> C, B> D. . From the mouth of a 6-one (port A c) A (6 A c), have A a (C-D) (c, l + c, l-2D + ... + Dr). Since A + AB + ... + B, l> C, l + c, lD + ... +19 ; C-D. that - accelerate the displacement of a curse for a rt a 1n Nang. lvZ .. the time spent by the rest of tz from a temple when sharing a stupid Figure 1, ? = fl, + tz =-~-+ pot friction force on the part did Rose throw into confusion w Temple m., '. a -. ∥ a 2. friction direction of the mutation.' {| i Can shown in Figure 2, the inclination of the ground conveyor belt of a gas 37., from A to B, the length of 16m, belt to work for a 10m / s speed of counterclockwise rotation. top of the belt without putting a muzzle velocity of the object mass 0.5kg, it's dynamic friction coefficient between belt-O.5, find the necessary objects from _A Sports B How much time. (sin37. = O.6, cos37. = O. Cool

transmission belt objects minimum transfer time problem exists, it should be noted that movement of objects on a conveyor belt problem of extreme value. Can Figure 4 said, AB is located in the vertical plane a smooth track,[link widoczny dla zalogowanych], height, terminal B at the level of the tangential direction. A superior quality of small objects from orbit P is released from rest at the top of A, B-side slide, after flying out of C-point fall on the ground, track shown in the dotted line BC shows. it is known relative to the landing point of the horizontal displacement of B OC = 1. Now the bottom track to install a level close to the B point belt, conveyor belt right and B point,[link widoczny dla zalogowanych], a 'distance as a post. When the belt is stationary, so that P released again from the A point of rest, it left the track and slide on the conveyor belt level after flying from the right, still on the ground on the c point. When the wheel rotation speed of constant speed drive belt to move to the right (the other conditions unchanged), the landing point of the object P D. excluding air resistance, and asked: What is the conveyor speed to meet the conditions of the size, OD has the minimum distance between s? this minimum number? analysis and solution: the object P from the track right from the conveyor belt slide low or flat projectile motion are doing, because the two ends of equal height from the ground, so the level of flat projectile motion range and initial velocity is proportional to Two levels were set a range of z-, zz, horizontal velocity, respectively,[link widoczny dla zalogowanych], that of a fish 11 '12 One can see from the title means, f the level of a -1. small object P on the conveyor belt sliding, sliding friction do negative work, the kinetic energy theorem was a specially gifted Wu specific advantages surprised, and then have a solution. When the belt moves to the right, to make small the level of the minimum range of objects, you must get it right when the conveyor speed minimum, which requires P on the conveyor belt has been done uniform deceleration, then the conveyor speed is less than or equal to Xi calculated earlier in the stationary conveyor belt P Slide the right speed., so that the object P to leave the conveyor speed for the port, that is, when the speed of conveyor belt, OD The minimum distance between a z. discussion: If the problem is the size of the conveyor speed into what conditions to meet, OD between has a maximum distance of s, the maximum is the number? At this time, did not change the substance of the issue. To the maximum range of P levels, P must reach maximum speed when the conveyor belt right. This requires that P on the conveyor belt has been done uniformly accelerated motion. we know from the kinetic energy theorem, P reaches a maximum speed of the far right to meet the specific distinctions and one an excellent post, this solution paternity ‰ 7. ∞ ,,~..; IIl {ll {i {;. { i};;}

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