Teaching demonstrator for small horizontal planar concurrent force system

Abstract

A teaching demonstrator for a small horizontal planar concurrent force system is composed of pulleys, ropes, movable and rotatable supports, weight discs, weights, a movable and rotatable angle measuring dial, an experiment table, and the like. After the pulleys are connected by shafts, the pulleys are fixed to the experiment table. The ropes are respectively connected with the weight discs afterpassing by the corresponding pulleys. A same-direction force, an opposite force and the equivalence of component forces and a resultant force of a planar concurrent force system under other complex conditions are verified. The conditions for the equivalence and replacement of forces, the resultant force and the component forces in case of a complex planar concurrent force system are obtained by reading the masses of the weights and measuring the included angles between the other ropes and the rope II under the condition of balance among the ropes, and the parallelogram law is further verified.According to the invention, only gravity is used as the source power of experiment, there is no need for any other capability, and low carbon and environmental protection are achieved. The experimenttable can be any table with edges, there is no need to customize an experiment table individually, and the cost of the experiment table is saved. The whole device is convenient to carry, there is noneed for a separate laboratory, and experiment can be conducted in any place with operation room, such as in a classroom or bedroom. The experiment equipment is concise, intuitive and easy to learn.

Description

technical field [0001] The invention belongs to the technical field of middle and high school physics and mechanics courses in the education industry and statics research in engineering design and structural analysis, and particularly relates to a force system, that is, a force in which the action lines of each force are in the same plane and converge at one point The equivalent transformation of the system (called the plane converging force system), such as: on a plane, the decomposition and synthesis of the converging force under various conditions, the equipment for equivalent and alternative testing experiments. Background technique [0002] The force system in which the lines of action of the forces are in the same plane and converge at one point is called a plane converging force system. The plane intersection force system is the simplest and most basic force system. In theoretical mechanics, there are two methods for solving problems of a plane converging force syste...

AI Technical Summary

Problems solved by technology

At present, there are simple verification experiments in high school physics that use spring balances and strings to measure the magnitude and direction of force; in structural mechanics, the equipment used to test the force and deformation of trusses; in engineering mechanics experiments, most of them are used to measure the mechanical properties of materials The use of equipment, the research and application of mechanical equipment for principle experiments on its mechanical properties, equivalent analysis, decomposition and synthesis have not been found

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