CN2075371U - Tester for parabola and collision moving - Google Patents

Abstract

The utility model relates to a tester for an object throwing movement and a collision movement. A rotary projectile with a writing brush is arranged at the center of a cylinder. When the rotary projectile rolls, rotates and falls from a railway perpendicular to the upper part of a panel, an object throwing moving trace is drawn by the nib of the writing brush on coordinates attached on the panel, and a collision moving experiment can also be done when a collision material receiving groove is arranged on a horizontal base. The teaching device can help students to visually establish the motion decomposition concept, the momentum conservation concept and the object throwing concept, and ejection velocities are determined. The utility model has the advantages of short time of each experiment, high accuracy precision, wide ranges of application, simple structure, and convenient manufacture, use and maintenance, and the utility model is favorable for teachers to demonstrate on classes and students to experiment group by group.

Description

Tester for parabola and collision moving

The utility model belongs to instruments used for education, promptly is used as student's grouping and teacher and demonstrates the flat throwing of object, the track of inclined throw movements and parabolic, the collision movement experiment instrument of collision experiment.

Existing object collision movement experiment instrument and projectile motion experiment instrument are two kinds of instruments used for education of simple function, and every kind of instrument all can only be done the exercise testing of a type.With the point that this instrument is got (or collision) small ball of dishing out from different height, the track that connects to form, as the rule of demonstration object of which movement, the subject matter of existence, the one, the demonstration speed when doing experiment is slow.Teacher does to get ready to the student at school the time and paints parabolical experiment, and bustling about is the time of a class nearly, just can finish once experiment, and the para-curve that draws so, must influence teacher's teaching process.The 2nd, the para-curve error that draws when doing experiment is big.Because the bead that falls from sustained height, error is all arranged between each para-curve, and the para-curve that connects of the point got of the bottom that utilizes small ball, can not represent the track of bead center of mass motion, so, more to parabolical top, error is big more, so that can't draw the conclusion that level throw motion can be decomposed into the linear uniform motion of the movement of falling object of vertical direction and horizontal direction.When also having school teacher's teaching, with the magnet of the dishing out parabolical instrument of magnetic that on magnetic sheet, draws, demonstrate the rule of projectile motion to the student, this experiment instrument also is because the magnet and the friction between the magnetic sheet of dishing out are bigger, the para-curve error of being drawn is big, thereby can not make the student draw above-mentioned correct conclusion.Moreover, very inconvenient when this instrument uses.

The purpose of this utility model is to provide a kind of as long as once just can draw the instruments used for education that object is put down the track of throwing, inclined throw movements or carried out the momentum conservation collision experiment easily accurately.

The method that the utility model is finished is to utilize the object of rotation that the gyroscope principle of determining sensing is arranged, feel at ease in the center of a small cylinder and to adorn a little writing brush, when the track top upper edge track of right cylinder from experiment instrument rolls downwards, de-orbit behind the mouth, continue rotation, the little writing brush that contains ink in the right cylinder in the right cylinder rotary course, the movement locus that just on the coordinate paper that is attached on the vertical panel, drawn, this track is exactly the para-curve when dishing out object of which movement.In object when rotation because dish out, can not change direction of motion with the small friction of paper because of little writing brush point, thereby what obtain is accurate projectile motion track.If the thing groove that connects of projectile motion experiment instrument is taken off, load onto collision and connect the thing groove, also just can carry out the research of momentum conservation collision problem more easily than existing instrument.

Advantage of the present utility model: one, help teaching.Can once draw accurately the flat throwing of object, tiltedly throw track, for the teacher has saved a large amount of time in classroom instruction, can set up notion, momentum conservation notion, para-curve notion that motion is decomposed, Seeking Truth ejection velocity intuitively for the student.Two, the accurate precision height of experiment.The error that is decomposed into linear uniform motion in the horizontal direction is less than 2%.Three, usage range is wide.Not only can be used for the physics teaching of senior middle school and the general physics teaching of university, and can be used for the mathematical education of senior middle school.Four, can the experiment of double as collision movement.Except studying the projectile motion, can also be used to study collision movement.Be used to collide the pearl of getting ready and can not land loss, very easy to use.And in experimentation, can save a large amount of paper and transfer paper, save to buy the fund of instruments used for education, articles for use to school, and help strengthening management instruments used for education.Five, simple in structure, produce, use, maintenance is all very convenient.

Accompanying drawing 1 is a front view of the present utility model, and Fig. 2 is a right view, and Fig. 3 connects thing groove synoptic diagram for collision, and Fig. 4 is rotation projectile structural representation.

Most preferred embodiment of the present utility model is with highly regulating turn-knob (3) track (4) to be fixed on vertical panel (6) top; coordinate paper (7) tightly is attached on the vertical panel; " Qian " shape connects thing groove (8) and is installed on the horizontal base of fixing with horizontal adjustment turn-knob (2) (1); the rotation projectile (5) that replaces small ball is a right cylinder; little writing brush (10) is vertically mounted on rotation through hole, the positive center of projectile; the bottom of writing brush is flexible turn-knob (9); the flexible turn-knob of this part is to stretch out through hole when being used to regulate writing brush work; make things convenient for setting-out; recall to when not working in the hole, be beneficial to the protection nib and be not damaged.Do when experiment, the rotation projectile is gone up downwards from the track top rolled, behind the deorbit mouth, the rotation projectile continues to rotatablely move, and containing the vestige that stays on the coordinate paper of little writing brush point of ink just is the projectile motion track.Take off " Qian " shape under the horizonal base plate and connect the thing groove, change longer " Qian " shape collision and connect thing groove (11), be the experimental apparatus of doing collision movement.The collision experiment instrument of assembling is than far better the simple and easy collision experiment device that shelf is positioned on the desktop, globule is got ready on the ground like this, when doing collision experiment, globule is dropped into collision and is connect the thing groove and get ready simultaneously, can not fall on the ground and lose, and the data that draw are accurate, make things convenient for teacher's class demonstration and student experiment in group.

Claims (2)

1, a kind of parabolic, collision movement experiment instrument, comprise track (4), vertical panel (6), it is characterized in that highly regulating turn-knob (3) track is fixed on vertical panel top, coordinate paper (7) tightly is attached on the vertical panel, " Qian " shape connects thing groove (8) and is installed on the horizontal base of fixing with horizontal adjustment turn-knob (2) (1), rotation projectile (5) is a right cylinder, and little writing brush (10) is vertically mounted on rotation through hole, the positive center of projectile, and the bottom of writing brush is flexible turn-knob (9).

2, instrument according to claim 1 is characterized in that installing on the horizonal base plate " Qian " shape collision of doing the collision movement experiment and connects thing groove (11).

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