CN204884352U - Throw motion demonstration appearance on inertia - Google Patents

Abstract

The utility model discloses throw motion demonstration appearance on inertia provides one kind and can assist and throw the motion on study and the cognitive inertia, and the intensification student is to the laboratory glassware of motion laws's understanding, should demonstrate the simple structure of appearance, and the phenomenon is obvious, and no potential safety hazard is and convenient operation. Throw motion demonstration appearance on inertia contains the base, and the base contains a vertical riser, and the riser top is equipped with a fixed pulley, and the lower extreme is equipped with two strip metal guide rails, two strip metals for the guide rail wire respectively with the base on two terminals be linked together, be equipped with an electro -magnet between the two strip metal guide rails, a rope is being tied up to the electro -magnet upper end, and the fixed pulley is walked around to the rope, and the hook sign indicating number that has certain quality is hung to the other end, draw with having certain elastic sheetmetal at the two poles of the earth of electro -magnet, takes respectively on two strip metal guide rails, furtherly, utilize student's power -on to cross two terminals and the metal guide rail is supplied power for the electro -magnet, and a little iron ball can be absorb to the electro -magnet.

Description

Throwing motion demonstrating instrument on inertia

Technical field

The utility model relates to teaching aid field, is applied particularly to assisted learning and the motion of cognitive inertia upthrow, deepens student to the understanding of relevant motion.

Background technology

At the mechanics teaching of high a grade with exercise, generally all can talk about such problem: the hanging of object is on balloon, and when balloon rises to a certain height with the even acceleration of object (or at the uniform velocity), object falls down from balloon.But because object, in the moment leaving balloon, has an instantaneous velocity upwards, so object is not fall at once, but do the motion of inertia upthrow.

Students ' Learning is with when understanding physical process that this inertia upthrow move, and have a hunch very abstract, shortage perceptual knowledge, not easily accepts.Therefore be necessary design instrument, classroom is demonstrated this physical process.

Summary of the invention

Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art, provide one can assisted learning and cognitive inertia upthrow motion, deepen student to the experimental apparatus of the understanding of the characteristics of motion, the structure of this demonstrator is simple, phenomenon is obvious, easy to operate without potential safety hazard.

The utility model solves the technical scheme that its technical matters adopts: throwing motion demonstrating instrument on inertia, comprise base, base comprises a vertical riser, a fixed pulley is provided with above riser, lower end is provided with two strip metal guide rails, and two strip metal guide rail wires are connected with the binding post of two on base respectively;

Be provided with an electromagnet between above-mentioned two strip metal guide rails, a rope is tied up in electromagnet upper end, and fixed pulley walked around by rope, and the other end hangs with the hook code of certain mass;

The two poles of the earth of above-mentioned electromagnet are drawn with having certain flexible sheet metal, ride on two strip metal guide rails respectively;

Further, utilize student power source to be powered to electromagnet by two binding posts and metal guide rail, electromagnet can draw a little iron ball.

The utility model compared with prior art has the following advantages: throwing motion demonstrating instrument on the utility model inertia, the simulation to " motion after departing from from balloon with balloon rising object " this scene of life is achieved by simple structure, help student to understand relevant motion, be conducive to student and better understand the law of inertia.Facts have proved this instrument have cheap, operation is simple and reliable, visual in image, practical, security advantages of higher, middle school physics teaching has certain Practical significance.

Accompanying drawing explanation

Fig. 1 is structural drawing of the present utility model.

Description of reference numerals:

1-fixed pulley, 2-rope, 3-hook code, 4-riser, 5-base, 6-binding post, 7-little iron ball, 8-electromagnet, 9-metal guide rail.

Embodiment

Below in conjunction with drawings and Examples, the utility model embodiment is described:

Fig. 1 shows a kind of concrete structure of the present utility model, as shown in the figure, throwing motion demonstrating instrument on the inertia of our development, comprise base 5, base 5 comprises a vertical riser 4, be provided with a fixed pulley 1 above riser 4, lower end is provided with two strip metal guide rail 9, two strip metal guide rail 9 wires and is connected with the binding post of two on base 56 respectively;

Be provided with an electromagnet 8 between above-mentioned two strip metal guide rails 9, a rope 2 is tied up in electromagnet 8 upper end, and fixed pulley 1 walked around by rope 2, and the other end hangs with the hook code 3 of certain mass;

The two poles of the earth of above-mentioned electromagnet 8 are drawn with having certain flexible sheet metal, ride on two strip metal guide rails 9 respectively;

Further, utilize student power source to be powered to electromagnet 8 by two binding posts 6 and metal guide rail 9, electromagnet 8 can draw a little iron ball 7.

Principle of the present utility model is as follows: just started electromagnet to move on base plate, allow the two poles of the earth of electromagnet and metal guide rail good contact, utilize student power source to power (can be alternating current also can be direct current) to electromagnet, at this moment, electromagnet can hold little iron ball.

Rope is walked around fixed pulley, and the other end hangs up the hook code of certain mass.After stable, let go, electromagnet upwards does accelerated motion (electromagnet also can be allowed to move with uniform velocity by adjustable hook code weight) under the effect of hook code, and hook code is heavier, and electromagnet acceleration is larger, leaves guide rail hourly velocity also larger.

When electromagnet rises to metal guide rail top, power supply disconnects automatically, and electromagnet loses magnetism, and little iron ball departs from.But can see that little iron ball does not fall down, but first turn around to move down to rising certain altitude again, Here it is, and inertia upthrow has moved at once.

In actual use, a cushion pad can be placed on base, in order to avoid break hook code.

By reference to the accompanying drawings the utility model preferred implementation is explained in detail above, but the utility model is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, can also make a variety of changes under the prerequisite not departing from the utility model aim.

Do not depart from design of the present utility model and scope can make many other and change and remodeling.Should be appreciated that the utility model is not limited to specific embodiment, scope of the present utility model is defined by the following claims.

Claims (1)

1. throwing motion demonstrating instrument on a kind of inertia, it is characterized in that: comprise base (5), base (5) comprises a vertical riser (4), riser (4) top is provided with a fixed pulley (1), lower end is provided with two strip metal guide rails (9), and two strip metal guide rails (9) wire is connected with two binding posts (6) on base (5) respectively; Be provided with an electromagnet (8) between described two strip metal guide rails (9), a rope (2) is tied up in electromagnet (8) upper end, and fixed pulley (1) walked around by rope (2), and the other end hangs with the hook code (3) of certain mass; The two poles of the earth of described electromagnet (8) are drawn with having certain flexible sheet metal, ride over respectively on two strip metal guide rails (9).