Experimental device for exploring centripetal force decisive factors based on data

Abstract

The invention relates to the technical field of middle school physics experiment equipment, in particular to an experimental device for exploring centripetal force decisive factors based on data. Thedevice is provided with a square support and supporting legs, vertical rods are respectively arranged on the left side and the right side above the square support; the upper ends of the vertical rodsare connected through a cross beam; wherein a support rod is arranged on the square support; a driving motor is arranged on the side surface of the supporting rod just under the cross beam; the base side surface of the driving motor is connected with the support rod side surface; the output shaft of the driving motor extends out of the upper part of the supporting rod and is connected with a rotating rod; the output shaft of the driving motor is taken as an original point by the rotating rod; a fixed pulley is arranged on the rotating rod at the original point; a radius ruler is arranged on the rotating rod on the left side of the original point, a transparent sliding groove is formed above the radius ruler, a tension ball is arranged in the sliding groove, the tension ball penetrates through the fixed pulley through a pull rope to be connected with a tension meter, and a tachometer is arranged on the cross beam on the side face of the tension meter, and the device has the advantages of being simple in structure, good in using effect, convenient for students to understand and master centripetal force formulas and the like.

Description

technical field [0001] The invention relates to the technical field of middle school physics experiment equipment, in particular to an experimental device for exploring the determinants of centripetal force based on data, which is simple in structure, good in use effect and convenient for students to understand and master the formula of centripetal force. Background technique [0002] As we all know, "centripetal force" is a compulsory course in modern physics. It has been studied in junior high school, and in-depth research is required in high school. It is also the focus of research in universities. In physics teaching, experimental seminar teaching is better than cramming teaching. It can also enable students to deeply understand and master the knowledge they have learned. Students can be fully involved in the experiment, and each study group can conduct experiments and discussions in person. [0003] At present, in the chapter about centripetal force in physics textbooks...

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Problems solved by technology

[0003] At present, in the chapter about centripetal force in physics textbooks, after students use Newton's second law to obtain the expression of centripetal force, they have a verification experiment: use a conical pendulum to roughly verify the expression of centripetal force. The actual operation of this experiment has the following There are several problems: 1. It is difficult to make the ball move along a certain circle on the paper in the specific operation, and most of the balls move in an ellipse; 2. When the ball moves in a circle, there is a certain distance from the paper surface, which cannot Determine which circle it is moving on, the measurement error of the radius r is large; 3. In the conical pendulum, the vertical height h of the ball from the suspension point is not easy to determine, and the measurement error of h is large; the hand-cranked centripetal force commonly used in laboratories now Demonstration instrument, and can only visually measure the force, so to verify the expression of centripetal force, the error is large

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