CN206134034U

CN206134034U - Presentation device is synthesized to mechanics for teaching

Info

Publication number: CN206134034U
Application number: CN201620734664.5U
Authority: CN
Inventors: 周越
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-07-12
Filing date: 2016-07-12
Publication date: 2017-04-26
Anticipated expiration: 2026-07-12

Abstract

The utility model discloses a presentation device is synthesized to mechanics for teaching, uncovered box (1) is transparent material, and place in the interior bottom of uncovered box (1) metal sheet (6) or plank (3), and the shape of metal sheet (6) or plank (3) is the same and suit with the interior bottom of uncovered box (1), place at metal sheet (6) or plank (3) upper surface billet (2) or metal block (7), and tensiometer (4) set up the outside in uncovered box (1), billet (2) or metal block (7) are connected with the one end of stay cord (5), and the other end of stay cord (5) passes uncovered box (1) lateral wall and is connected with tensiometer (4), the shape of billet (2) and metal block (7) is the same. Can demonstrate interact between the multiple power to its relation each other when making the various power combined action of understanding that the student can understand.

Description

Mechanics comprehensive demonstration device is used in teaching

Technical field

The utility model is related to a kind of apparatus for demonstrating, and mechanics comprehensive demonstration device is used in specifically a kind of teaching.

Background technology

Mechanics is part required in Middle School Physics.The species of study idea is needed in mechanics to be included frictional force, pressure, floats Power, pulling force etc., each power could clearly understood that teacher is typically needed to different in teaching in study for the ease of student Power carries out experimental demonstration, so that student could clearly understood the mechanism of the power；But at present various apparatus for demonstrating are all single A pair various power are demonstrated, and do not have many kinds of force comprehensive demonstration device, so when teacher's explanation interacts to many kinds of force, nothing Method is demonstrated, and causes student not could clearly understood the relation of the interphase interaction of various power.

The content of the invention

For the problem that above-mentioned prior art is present, the utility model provides a kind of teaching and uses mechanics comprehensive demonstration device, The interphase interaction of many kinds of force can be demonstrated, so that student can be clearly understood from its pass each other during various power collective effects System.

To achieve these goals, the technical solution adopted in the utility model is：This kind of teaching is filled with mechanics comprehensive demonstration Put, including open casing, metallic plate, plank, tensiometer, wooden unit and metal derby, the open casing is transparent material, metallic plate Or plank be placed on the inner bottom part of open casing, metallic plate or plank shape it is identical and mutually fit with the inner bottom part of open casing Should；Wooden unit or metal derby are placed on metallic plate or plank upper surface, and tensiometer is arranged on the outside of open casing；Wooden unit or metal Block is connected with one end of drawstring, and the other end of drawstring is connected through open wall box with tensiometer；The wooden unit and metal derby Shape it is identical.

Further, the wooden unit and metal derby are shaped as square.

Further, the metal derby is stainless steel.

Compared with prior art, the utility model adopts open casing, metallic plate, plank, tensiometer, wooden unit and metal derby Combine mode, and plank is put in open top container body, and then wooden unit is placed on plank, is connected with wooden unit by drawstring, now Pull tensiometer, and then pulling force is delivered on wooden unit by drawstring, when wooden unit is not moved explanation pulling force less than wooden unit and plank it Between frictional force, when wooden unit records when pulled the numerical value of now tensiometer；Then plank is taken out and is put into metallic plate, repeated Said process, measures the numerical value of wooden unit tensiometer when pulled；Both compare and understand frictional force with the rough surface of contact surface Degree is relevant；Then wooden unit is taken out and is put into shape identical metal derby, the above-mentioned experiment of repetition records respectively metal derby on plank Value of thrust when pulled and on a metal plate value of thrust when pulled；Value of thrust when numerical value and wooden unit is compared can Know, the pressure (i.e. the gravity of horizontal positioned object) between frictional force and contact surface is relevant, therefore student can be made to understand pressure, table Relation between surface roughness and frictional force；When buoyancy demonstration is carried out, first wooden unit is put in open top container body, then notes in water Enter in open top container body, now wooden unit can be floated by buoyancy, the bottom of wooden unit does not contact with plank or metallic plate, now between the two Zerofriction force；Then wooden unit and water are taken out and is put into after metal derby, the water filling into casing makes water level exceed metal derby bottom, now Metal derby is drawn by tensiometer, when metal derby when pulled, the numerical value of record now tensiometer, continuing the water filling into casing makes water Position reaches the middle part of metal derby, now measures metal derby value of thrust when pulled；Compared with when non-water filling and when water filling is less Relatively understand, due to buoyancy, metal derby is to plank or the reduced pressure of metallic plate, so that the frictional force of metal derby bottom drops It is low, therefore pull its pulling force to reduce；So demonstration when make student could clearly understood pressure, buoyancy, frictional force and pulling force it The relation of interphase interaction；It is easy to Students ' Learning.

Description of the drawings

Fig. 1 is the sectional view that the utility model uses plank and wooden unit；

Fig. 2 is the top view of Fig. 1；

Fig. 3 is the sectional view that the utility model uses metallic plate and wooden unit；

Fig. 4 is the top view of Fig. 3；

Fig. 5 is the schematic diagram of wooden unit in the utility model；

Fig. 6 is the schematic diagram of metal derby in the utility model.

In figure：1st, open casing, 2, wooden unit, 3, plank, 4, tensiometer, 5, drawstring, 6, metallic plate, 7, metal derby.

Specific embodiment

Below the utility model is described in further detail.

As shown in Figures 1 to 4, the utility model includes open casing 1, metallic plate 6, plank 3, tensiometer 4, the and of wooden unit 2 Metal derby 7, the open casing 1 is transparent material, and metallic plate 6 or plank 3 are placed on the inner bottom part of open casing 1, metallic plate 6 Or the shape of plank 3 is identical and inner bottom part with open casing 1 is adapted；Wooden unit 2 or metal derby 7 are placed on metallic plate 6 or wood The upper surface of plate 3, tensiometer 4 is arranged on the outside of open casing 1；Wooden unit 2 or metal derby 7 are connected with one end of drawstring 5, drawstring 5 The other end be connected with tensiometer 4 through the side wall of open casing 1；The wooden unit 2 is identical with the shape of metal derby 7.

Further, the wooden unit 2 and metal derby 7 are shaped as square.

Further, the metal derby 7 is stainless steel.

During experiment, plank 3 is put in open casing 1, then wooden unit 2 is placed on plank 3, by drawstring 5 and wooden unit 2 Connection, now pulls tensiometer 4, and then pulling force to be delivered on wooden unit 2 by drawstring 5, and when wooden unit 2 is not moved, explanation pulling force is less than Frictional force between wooden unit 2 and plank 3, when wooden unit 2 records when pulled the numerical value of now tensiometer 4；Then plank 3 is taken Go out to be put into metallic plate 6, repeat said process, measure the numerical value of the tensiometer 4 when pulled of wooden unit 2；Both compare and understand friction Power is relevant with the surface roughness of contact surface；Then wooden unit 2 is taken out and is put into shape identical metal derby 7, the above-mentioned experiment of repetition Value of thrust and value of thrust on metallic plate 6 when pulled of the metal derby 7 on plank 3 when pulled is recorded respectively；By numerical value With wooden unit 2 when value of thrust compared with understand, the pressure (i.e. the gravity of horizontal positioned object) between frictional force and contact surface has Close, therefore student can be made to understand the relation between pressure, surface roughness and frictional force；When buoyancy demonstration is carried out, first by wood Block 2 is put in open casing 1, is then injected water in open casing 1, and now wooden unit 2 can be floated by buoyancy, the bottom of wooden unit 2 Do not contact with plank 3 or metallic plate 6, now zerofriction force between the two；Then wooden unit 2 and water are taken out and are put into after metal derby 7, Into casing water filling make water level exceed the bottom of metal derby 7, now by tensiometer 4 draw metal derby 7, when metal derby 7 when pulled, The numerical value of now tensiometer 4 is recorded, continuing the water filling into casing makes water level reach the middle part of metal derby 7, now measure metal derby 7 Value of thrust when pulled；Understand compared with during non-water filling and when water filling is less, due to buoyancy, metal derby 7 is to plank 3 Or the reduced pressure of metallic plate 6, so that the frictional force of the bottom of metal derby 7 is reduced, therefore pull its pulling force to reduce；So exist Student is set to could clearly understood the relation of the interphase interaction of pressure, buoyancy, frictional force and pulling force during demonstration；It is easy to Students ' Learning.

Claims

1. mechanics comprehensive demonstration device is used in a kind of teaching, it is characterised in that including open casing (1), metallic plate (6), plank (3), tensiometer (4), wooden unit (2) and metal derby (7), the open casing (1) is transparent material, metallic plate (6) or plank (3) Be placed on the inner bottom part of open casing (1), metallic plate (6) or plank (3) shape it is identical and with the inner bottom part of open casing (1) It is adapted；Wooden unit (2) or metal derby (7) are placed on metallic plate (6) or plank (3) upper surface, and tensiometer (4) is arranged on open top container The outside of body (1)；Wooden unit (2) or metal derby (7) are connected with one end of drawstring (5), and the other end of drawstring (5) passes through open casing (1) side wall is connected with tensiometer (4)；The wooden unit (2) is identical with the shape of metal derby (7).

2. mechanics comprehensive demonstration device is used in a kind of teaching according to claim 1, it is characterised in that the wooden unit (2) and Metal derby (7) is shaped as square.

3. mechanics comprehensive demonstration device is used in a kind of teaching according to claim 1 and 2, it is characterised in that the metal derby (7) it is stainless steel.