CN201177884Y

CN201177884Y - Circular motion directional demonstration instrument

Info

Publication number: CN201177884Y
Application number: CNU2008200017784U
Authority: CN
Inventors: 季倬
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-01-06
Filing date: 2008-01-06
Publication date: 2009-01-07
Anticipated expiration: 2018-01-06

Abstract

The utility model relates to an experimental device for demonstrating the speed direction of an object that carries out circular motion to follow the tangent direction of a point at any instant, and is suitable for being taken as a demonstration experiment in a classroom in a middle school. In order to make up the defect that a device for conveniently displaying the motion direction of the object carrying out the circular motion does not exist in a laboratory, an aluminum ring is sleeved on the outer edge of a rotary disk; sponge which is required to be dipped in ink is sleeved between the outer edge of the rotary disk and the aluminum ring; a small hole is drilled on the outer side of the aluminum ring; the ink is thrown out of the small hole after the rotary disk rotates, and a motion track along a tangent is drawn on a white paper below, thereby successfully achieving the experimental purpose, and achieving very good teaching effect. The experimental device has the advantages of very simple drawing materials, convenient manufacture and easy popularization.

Description

Circular motion direction demonstrator

Affiliated technical field

The utility model relate to a kind of object of demonstrating circular motion at the velocity reversal of moment arbitrarily all along the experimental provision of the tangential direction of this point, be applicable in the classroom, middle school as lecture experiment.

Background technology

All along the tangential direction of this point, this is main conclusions in the high school physics kinematics to the object of circular motion at the velocity reversal of any moment.,, in the problem of reality, often will not represent the arrow of direction of motion to be drawn as along the arrow of arc track line though the student accepts this conclusion reluctantly through observing and thinking.Therefore, be necessary the new teaching of curvilinear motion make great efforts development and operation easy, tangible, the convictive lecture experiment of phenomenon, help the student and deepen relevant rule its direction of motion of object that moves in a circle.But in the ready-made instrument that the laboratory is bought, do not have suitable like this experiment equipment, must must paddle one's own canoe designs and produces.

Summary of the invention

For a kind of experimental provision is provided, the object of checking circular motion at the velocity reversal of any moment all along this this conclusion of tangential direction on the circumference, the utility model provides a kind of rotating disk to throw away ink to present ink and leave the rectilinear motion of doing behind the rotating disk, reflect the tangential direction that this direction of motion in a flash of ink is exactly this point on the circumference.

The concrete technical scheme of the utility model is: a lightweight rotating disk (for example pot cover) is reequiped, put a circle aluminium circle at the outer of rotating disk edge, between the outer of rotating disk and aluminium circle, can embed a circle sponge, sponge can suck ink, on the aluminium circle outside, be drilled with some apertures, so that the ink in the sponge is done centrifugal motion and can be penetrated during dial rotation from aperture.The hard thing of support of the indent corresponding with rotating shaft is set at the center of rotating disk, rotating disk can be equilibrated on the pinnacle of pillar, pillar is fixed on the following base.During experimental demonstration, with a bigger blank sheet of paper tiling on the table, pillar and base are put in the center, sponge in the rotating disk is suctioned ink, embed the aluminium circle, and the pinnacle that the inner recess of the hard thing of support of rotating disk is aimed at pillar is placed on the pillar, firmly rotate rotating disk, ink in the sponge throws away from aperture, leaves a trace on the blank sheet of paper below, demonstrates ink and leaves that travel direction is the tangential direction of circumference behind the rotating disk.

Maximum characteristics of the present utility model are exactly to utilize the rotation of rotating disk to throw away ink, present the object of circular motion easily, and the velocity reversal of its any moment is all along this tangential direction on the circumference.This experimental apparatus is made fairly simple, easy to operate, can reach extraordinary classroom effect.

Description of drawings

Below in conjunction with accompanying drawing and concrete experimental procedure the utility model is further specified.

Fig. 1 is a structural representation of the present utility model.

Embodiment principle schematic of the present utility model during Fig. 2.

1. rotating disks among the figure, 2. aluminium circle, 3. aperture, 4. sponge, 5. support hard thing, 6. inner recess, 7. rotating shaft pillar, 8. base, 9. blank sheet of paper

Embodiment

A lightweight rotating disk (1) is reequiped, put a circle aluminium circle (2) at the outer of rotating disk (1) edge, aluminium circle (2) the inside can embed sponge (4), and sponge (4) can suck ink, is drilled with some apertures (3) on aluminium circle (2).Center at rotating disk (1) is provided with the support hard thing (5) that inner recess (6) arranged corresponding with rotating shaft pillar (7), so that can be fulcrum with the center of rotating disk (1), be equilibrated on the rotating shaft pillar (7) on pinnacle, rotating shaft pillar (7) is fixed on the following base (8).

During experimental demonstration, with a bigger blank sheet of paper (9) tiling on the table, rotating shaft pillar (7) and base (8) are put in the center, the sponge (4) of rotating disk (1) lining is suctioned ink, embed aluminium circle (2), and rotating disk (1) is placed in the rotating shaft pillar (on (7), firmly rotate rotating disk (1), the ink of sponge (4) lining is thrown out of from aperture (3), blank sheet of paper is below left a trace on (9), and demonstrating ink, to leave rotating disk (1) back travel direction be the tangential direction in rotating disk (1) circumference sideline.

Claims

1, a kind of circular motion direction demonstrator is characterized in that: the outer of rotating disk is inlaid with a circle aluminium circle, is embedded with a circle sponge between the outer of rotating disk and the aluminium circle, and sponge inhales ink, and the aluminium circle outside is drilled with some apertures.