Buoyancy demonstration teaching aid for physical experiments

Abstract

The invention discloses a buoyancy demonstration teaching aid for a physical experiment, wherein the teaching aid comprises an operation platform, and the top of the operation platform is provided with two containers. Under the action of springs II, rubber blocks are tightly attached to the side walls of stand columns to fixe sliding sleeves, the end part of each sliding sleeve and the initial liquid surfaces of a liquid medium I and a liquid medium II are positioned at the same height; pull rings are pulled, when limiting pins are separated from limiting grooves, under the action of the gravity of floating blocks, a rotary disc rotates, moving blocks move in arc-shaped grooves, and the moving blocks move towards the two sides of a transverse plate I; the two floating blocks respectively fall into two containers, and the floating blocks float on the liquid surfaces of the liquid medium I and the liquid medium II; by observing the rising heights of the liquid medium I and the liquid medium II, the inference that the water discharge amounts of an object in the liquids with different densities are different when the buoyancy borne by the object is fixed can be verified more visually and vividly, and teaching of teachers and learning of students on the buoyancy principle are facilitated.

Description

technical field [0001] The invention relates to the technical field of teaching aids, in particular to a buoyancy demonstration teaching aid for physical experiments. Background technique [0002] The force exerted on an object submerged in a fluid by the fluid to lift it up is called buoyancy. Buoyancy refers to the difference (resultant force) of the fluid pressure on each surface of an object in a fluid (liquid and gas). In 245 BC, Archimedes discovered the principle of buoyancy. The definition of buoyancy is F float = G row (that is, the buoyancy on the object is equal to the gravity of the liquid displaced after the object sinks and rests), which can be used for calculation to derive the formula F float = ρ liquid gV row (ρ liquid represents the density of the liquid , the unit is kilogram / cubic meter; g represents a constant, which is the ratio of gravity to mass, g=9.8N / kg can be roughly calculated as 10N / kg; row V represents the volume of the displaced liquid, and ...

AI Technical Summary

Problems solved by technology

However, due to the limitations of traditional teaching aids, it is difficult for traditional teaching aids to display the deduced conclusions to students intuitively and visually, which is not conducive to students' learning of the principle of buoyancy

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