CN202929916U

CN202929916U - Acting force and counterforce demonstration device

Info

Publication number: CN202929916U
Application number: CN 201220693923
Authority: CN
Inventors: 朗斌; 应雄纯
Original assignee: Huzhou University
Current assignee: Huzhou University
Priority date: 2012-12-01
Filing date: 2012-12-01
Publication date: 2013-05-08
Anticipated expiration: 2022-12-01

Abstract

The utility model discloses an acting force and counterforce demonstration device which comprises a wooden bottom plate (1) which is fixed with a pair of upright posts (3). An upper disk dynamometer (5) is fixed on the upright posts (3) through a pair of movable clamping heads (4), and a lower disk dynamometer (9) is fixed through a pair of fixed clamping heads (2). A pulling force on the upper disk dynamometer (5) by a weight (6) and a pressure force on the lower disk dynamometer (9) by the weight (6), a water cup (7) and water operate on a same line. The weight (6) is moved down through the movable clamping heads (4) and enters into the water cup (7) gradually, that the reading of the upper disk dynamometer (5) is gradually decreased and the reading of the lower disk dynamometer (5) is gradually increased can be clearly seen, a reduced numerical value of the upper disk dynamometer (5) is always equal to an increased numerical value of the lower disk dynamometer (5), and it shows that a pair of forces in interaction are equal to each other and act on the same line.

Description

A kind of acting force and reaction demonstrator

Technical field

The utility model relates to a kind of physics facility and experimental technique, relates in particular to a kind of acting force and reaction demonstrator.

Background technology

Power is the interaction that is present between two articles, and the first object has acting force to the second object, and the second object also must have acting force to the first object.The prerequisite that they exist as oneself with the other side mutually can not exist isolatedly.We are called acting force to any one power wherein, and another power is called reacting force.Root a tree name Newton third law: the acting force between two objects and reacting force equal and opposite in direction, opposite direction, effect point-blank.

Acting force and reacting force are difficult points in junior middle school physics teaching, need the student to have stronger abstract thinking ability, and the student are few to the perceptual knowledge of this part content, so cause some concept obfuscations unclear.This experimental provision can be used as the additional experiment of Middle School Physics research acting force and reacting force, and method is simpler, and good demonstration effect is completed above-mentioned experiment easily.

The utility model content

The purpose of this utility model is to provide apparatus for demonstrating and the experimental technique of a kind of acting force and reacting force, physical significance clear and definite.

The purpose of this utility model is achieved in that and adopts device shown in Figure 1, fixes two root posts 3 on wooden base plate 1, on column 3 by the fixing upper disk dynamometer 5 of a pair of active chuck 4, by the fixing lower disc dynamometer 9 of a pair of fixed chuck 2.

Described upper disk dynamometer 5 is to measure the pulling force that institute's suspension counterweight 6 produces, and lower disc dynamometer 9 is to measure the pressure that the gravity of the suffered water tumbler 7 of supporting seat 8 and water, counterweight 6 produces; The pressure-acting that the pulling force that the upper disk dynamometers 5 of 6 pairs of counterweights produce and counterweight 6, water and water tumbler produce lower disc dynamometer 9 point-blank, supporting seat 8 is fixed on the measurement guide rod 10 of lower disc dynamometer 9, and keeps level.

Described upper and lower disk dynamometer adopts teaching to use the disk dynamometer, and model J2105 is comprised of pointer 11, index dial 12 and measurement guide rod 10, and measurement range is 0-10N, as shown in Figure 2.

Lower disc dynamometer 9 use fixed chucks 2 are fixed on column 3, regulate upper disk dynamometer 5 by active chuck 4, active chuck 4 moves down on column 3, make counterweight 6 move down, progress in water tumbler 7, the registration that can be clearly seen that disk dynamometer 5 is little by little reducing, and the registration of lower disc dynamometer 9 is little by little increasing, and the numerical value that upper disk dynamometer 5 reduces always equals the numerical value that lower disc dynamometer 9 increases.Thereby a pair of interactional power is described, always equal and opposite in direction ground effect point-blank.

Can be found out by the technical scheme that above-mentioned the utility model provides, a kind of acting force described in the utility model and reaction demonstrator adopt the direct-reading method, make experiment simple, quick, the physical significance clear and definite.

Description of drawings

Fig. 1 is the apparatus for demonstrating schematic diagram of the utility model acting force and reacting force.

Fig. 2 is disk dynamometer structural representation.

In figure: 1, base plate, 2, fixed chuck, 3, column, 4, active chuck, 5, upper disk dynamometer, 6, counterweight, 7, water tumbler, 8, supporting base, 9, the lower disc dynamometer, 10 measure guide rods, and 11, pointer, 12, index dial.

Embodiment

A kind of acting force of the present utility model and reaction demonstrator, its better embodiment as shown in Figure 1.

1, fix disk dynamometer 5 and lower disc dynamometer 9, regulate experimental provision, make the upper surface of supporting seat 8 be horizontal.

2, water tumbler 7 is placed on supporting seat 8, the inside is poured the approximately clear water of 1/2 height into, hangs the approximately counterweight of 0.5 kilogram in the lower end of upper disk dynamometer 5.

3, regulate the upward position of disk dynamometer 5 on column 3 by active chuck 4, make counterweight 6 move down, progress in water tumbler 7, the registration that can be clearly seen that disk dynamometer 5 is little by little reducing, and the registration of lower disc dynamometer 9 is little by little increasing, and the numerical value that upper disk dynamometer 5 reduces always equals the numerical value that lower disc dynamometer 9 increases.Thereby a pair of interactional power is described, irrelevant with the motion state of object, always equal and opposite in direction ground effect point-blank.

By this experiment, make the student be easy to clearly the character of a pair of interactional power, with deep impression.This tests excellent ingenious part, is that it can excite student's thinking, and experiment is simple, and is visual in image, the key of student's obscure understanding of hitting again.

The above; it is only the better embodiment of the utility model; but protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement are within all should being encompassed in protection domain of the present utility model.

Claims

1. an acting force and reaction demonstrator, it is characterized in that, comprise and fix a column (3) on wooden base plate (1), column (3) is upper by the fixing upper disk dynamometer (5) of a pair of active chuck (4), by the fixing lower disc dynamometer (9) of a pair of fixed chuck (2), the pressure-acting that the pulling force that counterweight (6) produces upper disk dynamometer (5) and counterweight (6), water tumbler (7) and water produce lower disc dynamometer (9) point-blank.

2. a kind of acting force according to claim 1 and reaction demonstrator, is characterized in that, is fixed with supporting seat (8) on described lower disc dynamometer (9), and keep the upper surface level of supporting seat (8).