CN2154516Y

CN2154516Y - Demonstrater of newtonian no.1 law

Info

Publication number: CN2154516Y
Application number: CN 92235375
Authority: CN
Inventors: 熊知会
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-11-27
Filing date: 1992-11-27
Publication date: 1994-01-26
Anticipated expiration: 2002-11-27

Abstract

The utility model relates to a demonstrator of Newtonian No. 1 law, comprising a horizontal plate and an inclined plane plate whose inner surfaces are longitudinal and uniformly provided with three parallel semicircular grooves, three experiment small balls and a stop frame for experiment small balls. A layer of rough soft objects and a layer of rougher soft objects are respectively placed in two of the three parallel semicircular grooves of the horizontal plate. At the time of use, the can small balls can be caused to move in the horizontal plate groove after downward slide only by pushing the stop frame. Simultaneously three times of experiments of the motion law on different object surfaces of the experiment small balls can be completed. Three times of experimental results can also be visually displayed. The demonstrating effect is good, and the structure is simple.

Description

Demonstrater of Newtonian No.1 law

The utility model provides a kind of Newton first law demonstration device, belongs to the education experiment utensil.

For the demonstration Newton first law, be to divide the surface level that three times dolly is slided from the inclined-plane at different materials to carry out by the method in the teaching material, last time the situation of testing can not keep in time experiment of back, must be by the mapping analysis experimental result." middle school physics " (junior middle school's part) published a kind of " magnetic control Newton first law demonstration device " on the 4th phase in 1991, three layers of vertical structure that it is made up of Lianping, three inclined-planes face, utilize sliding of magnet control experiment dolly, the demonstration effect is better, but its three experiment dollies slide the plane is divided into three layers, be not easy to comparison directly perceived to experimental result under the different condition, and complex structure.

The purpose of this utility model is in order to overcome weak point of the prior art, to finish three experiments simultaneously and can intuitively show three times experimental result, Newton first law demonstration device simple in structure simultaneously and provide a kind of.

The Newton first law demonstration device comprises leveling board, is connected the skewback of leveling board one end, three experiment beads and experiment bead divider, it is characterized in that having on leveling board and the skewback inner face three parallel, cross sections is semicircular groove vertical consistency, wherein places coarse, the more coarse soft-body of one deck respectively in two grooves on the leveling board; Experiment bead divider is installed in the dual-side of skewback, can rotate around point of fixity, has spring to be connected in addition between skewback and the divider, and under the elastic force effect, divider one horizontal edge is close on the skewback inner face; Leveling board one side is equipped with a level meter.

Fig. 1 is the utility model structural drawing.

Now illustrated embodiment is made detailed description to the utility model in conjunction with the accompanying drawings.

The Newton first law demonstration device comprises leveling board 1, be connected the skewback 2 of leveling board 1 one ends, three experiment beads 3 and experiment bead dividers 4.Have three parallel, cross sections on leveling board 1 and skewback 2 inner faces is semicircular groove 5 vertical consistency, places the coarse flannelette of one deck 6, more coarse cotton 7 in wherein two grooves on the leveling board respectively; Experiment bead divider 4 is installed in the dual-side of skewback 2, can rotate around point of fixity, has spring 8 to be connected in addition between skewback 2 and the divider 4, and under the elastic force effect, divider 4 one horizontal edges are close on skewback 2 inner faces; Leveling board 1 one sides are equipped with a level meter 9.

The utility model is owing to adopt above design, during use, by eye-level instrument 9, leveling board 1 calibration is placed horizontality, three experiment beads 3 are placed on respectively in the inclined-plane board slot of divider 4 horizontal edge tops, press divider 4, can make bead slide the back and in leveling board 1 groove, move, finish three experiments of experiment bead characteristics of motion on the different objects surface simultaneously, and can intuitively show experimental result three times, good demonstration effect, simple in structure.

Claims

1, a kind of Newton first law demonstration device, comprise leveling board (1), be connected skewback (2), three experiment beads (3) of leveling board (1) one end and test bead divider (4), it is characterized in that having on leveling board (1) and skewback (2) inner face three parallel, cross sections is semicircular groove (5) vertical consistency, wherein place coarse, the more coarse soft-body of one deck respectively in two grooves on the leveling board, experiment bead divider (4) is installed in the dual-side of skewback (2), can rotate around point of fixity.

2, Newton first law demonstration device as claimed in claim 1 is characterized in that having spring (8) to be connected in addition between skewback (2) and the divider (4), and divider (4) one horizontal edges are close on skewback (2) inner face.

3, Newton first law demonstration device as claimed in claim 1 or 2 is characterized in that leveling board (1) one side is equipped with a level meter (9).