CN201936500U - Overweight and weightlessness demonstration instrument - Google Patents

Abstract

The utility model aims to provide an overweight and weightlessness physical experimental apparatus. A base and an upright post are fixed in a small rectangular wooden case with transparent front and rear parts respectively, wherein a spring is sleeved on the upright post, a counterweight is connected to the upper end of the spring, and the lower end of the spring is connected to the base; and a weightlessness indicating green light A and an overweight indicating red light B are connected with two fixed contact pieces respectively, when the counterweight drives a movable contact piece to move upwards, the weightlessness indicating green light A is on, when the counterweight drives the movable contact piece to move downwards, the overweight indicating red light B is on, and when the counterweight does not move, both the weightlessness indicating green light A and the overweight indicating red light B are off. The overweight and weightlessness demonstration instrument can be used for stimulating various overweight and weightlessness phenomena, is stable in acceleration and favorable for observation.

Description

The Overweight and Zero Gravity apparatus for demonstrating

Technical field

The utility model relates to a kind of Physical Experiment, particularly a kind of overweight and weightless experimental provision of demonstrating.

Background technology

In production technology and scientific research, overweight and weightlessness is paid close attention to already and is utilized, and in physics teaching in secondary school, also is an important research contents.But the research that relates in the physics of middle school " overweight and weightless " experiment talks about being easy to, and it is but difficult really will to observe.People's stress problems to the floor in lifter is that the typical application Newton second law solves problem.But because the student does not have the perceptual knowledge of this respect, therefore need simulate various Overweight and Zero Gravity phenomenons with experiment, acceleration is stable like this, can be a little also long for the time of observing, help observing.

The utility model content

The purpose of this utility model provides a kind of Overweight and Zero Gravity physics facility, have simple in structure, explicit physical meaning, advantage such as convenient and practical.

The purpose of this utility model is achieved in that among Fig. 1, and in the transparent small rectangle wooden case in front and back (about 20 * 15 * 40mm), be fixed with base, column, be with spring on the column, the spring upper end connects a counterweight counterweight, and the lower end is connected on the base.Weightless indication green light A and overweight indication red light B are connected on respectively on two fixed touch plate, and when moving on the counterweight counterweight drive movable contact flat, green light A is bright, and when counterweight counterweight drive movable contact flat moved down, red light B was bright, and when the counterweight counterweight was motionless, two bulbs did not all work.

Fig. 2 is high about 2 a meters column, and a fixed pulley is fixed in the upper end, and the boxes of said apparatus is hung on an end of fixed pulley, and the other end hangs cylindrical counterweight, and its quality is adjustable.

Description of drawings

Fig. 1 is the Overweight and Zero Gravity tester

Fig. 2 is the Overweight and Zero Gravity demonstrating experiment device

1, metab, 2, overweight indication red light B, 3, movable contact flat, 4, weightless indication green light A, 5, fixed touch plate down, 6, go up fixed touch plate, 7, the counterweight counterweight, 8, column, 9, spring, 10, wooden case, 11, electric battery, 12, fixed pulley, 13, adjustable quality counterweight.

Embodiment

At first wooden case 10 is hung on an end of fixed pulley 12, its quality is M _C, the cylindrical counterweight 13 that other end sprung mass is adjustable, its quality is M _D

(1) when making M _C=M _DThe time, wooden case 10 and adjustable quality counterweight 13 can move with uniform velocity up and down, and weightless indication green light A and overweight indication red light B do not work, and overweight or weightless phenomenon does not take place.

(2) when making M _C＜M _DThe time, wooden case 10 is upwards done uniformly accelerated motion, and overweight indication red light B is bright, and the pressure that 7 pairs of springs of counterweight counterweight are described overweight phenomenon promptly occurs greater than the suffered gravity of counterweight counterweight.

(3) when making M _C＞M _DThe time, wooden case 10 is done uniformly accelerated motion downwards, and weightless indication green light A is bright, and the pressure that 7 pairs of springs of counterweight counterweight are described weightlessness promptly occurs less than the suffered gravity of counterweight counterweight.

Claims (2)

1. Overweight and Zero Gravity apparatus for demonstrating is characterized in that: in the transparent small rectangle wooden case in front and back, be fixed with base, column, be with spring on the column, the spring upper end connects a counterweight counterweight, and the lower end is connected on the base; Weightless indication green light A and overweight indication red light B are connected on respectively on two fixed touch plate, and when moving on the counterweight counterweight drive movable contact flat, weightless indication green light A is bright, when counterweight counterweight drive movable contact flat moves down, overweight indication red light B is bright, and when the counterweight counterweight was motionless, two bulbs did not all work.

2. Overweight and Zero Gravity apparatus for demonstrating according to claim 1 is characterized in that, the boxes of described apparatus for demonstrating is hung on an end of fixed pulley, and the other end hangs cylindrical counterweight, and its quality is adjustable.

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