CN217113582U - Kinetic energy conservation verification device - Google Patents
Kinetic energy conservation verification device Download PDFInfo
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- CN217113582U CN217113582U CN202123236325.4U CN202123236325U CN217113582U CN 217113582 U CN217113582 U CN 217113582U CN 202123236325 U CN202123236325 U CN 202123236325U CN 217113582 U CN217113582 U CN 217113582U
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- slideway
- turntable
- kinetic energy
- rotary table
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Abstract
The utility model discloses a kinetic energy conservation verification device, which comprises a first slideway, a second slideway, a rotary table and a chassis; the turntable comprises a first turntable, a second turntable and a dial; the first rotating disc is positioned at the bottom layer of the rotating table; the second rotary table is positioned in the middle layer of the rotary table; the dial is positioned at the top layer of the turntable; the first slideway is rigidly connected with the first rotary table; the second slideway is rigidly connected with the second turntable; the turntable is connected with the chassis through a rotating shaft; leveling bubbles are arranged on the chassis; leveling knobs are arranged at four corners of the base plate. The utility model discloses can verify the law of conservation of kinetic energy of two rigidity bobbles of arbitrary direction motion, easy operation.
Description
Technical Field
The utility model relates to a physics experiment instrument field, concretely relates to device is verified in conservation of kinetic energy.
Background
The kinetic energy is the energy of the object in the motion state, and the calculation formula is
In an isolated system comprising a plurality of rigid objects, the kinetic energy of a single rigid object can be changed by collision between the rigid objects, but the sum of the kinetic energies of all the rigid objects is not changed, which is the law of conservation of kinetic energy. Kinetic energy conservation is often required to be demonstrated in physical teaching, and the traditional method for demonstrating kinetic energy conservation is as follows: for the first time, let a mass be m 1 The rigid small ball rolls down along the slope with the horizontal bottom end, and after reaching the bottom end of the slope, the rigid small ball is openedThe horizontal throwing motion is started, and then the horizontal distance s from the starting point of the horizontal throwing motion to the floor point of the rigid small ball is recorded 1 Second, let the mass be m again 1 The rigid ball rolls down the slope, but another mass m is placed in advance at the bottom end of the slope 2 The two rigid small balls perform horizontal projectile motion after elastic collision, and the horizontal distance s from the starting point of the horizontal projectile motion to the landing point of the two rigid small balls is recorded 2 And s 3 Because the falling height of the small ball in the vertical direction is constant, the falling time is constant, and the horizontal speed is considered
Therefore, the horizontal velocity v is proportional to the horizontal movement distance s, the horizontal projectile starting point kinetic energy is proportional to the square of the horizontal movement distance s, and the horizontal projectile starting point kinetic energy is verified to be proportional to the square of the horizontal movement distance s
And finally, the principle of kinetic energy conservation verification is realized, the method is simple to operate, but only the kinetic energy conservation of two rigid balls with the same speed direction can be verified, and the kinetic energy conservation of two rigid balls with different speed directions cannot be verified.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved is as follows:
an object of the utility model is to provide a device is verified in conservation of kinetic energy to verify the conservation of kinetic energy of two different rigidity bobbles of speed direction.
The technical scheme is as follows:
in order to achieve the above object, the utility model provides a following technical scheme: a kinetic energy conservation verification device comprises a first slideway, a second slideway, a rotary table and a chassis; the turntable comprises a first turntable, a second turntable and a dial; the first rotary table is positioned at the bottom layer of the rotary table; the second rotary table is positioned in the middle layer of the rotary table; the dial is positioned at the top layer of the turntable; the first slideway is rigidly connected with the first rotary table; the second slideway is rigidly connected with the second turntable; the turntable is connected with the chassis through a rotating shaft; leveling bubbles are arranged on the chassis; leveling knobs are arranged at four corners of the base plate.
The technical principle is as follows: the two rigid small balls respectively slide down through the two slideways, collide with each other on the rotary table and finally fall onto the chassis, and the kinetic energy of the two rigid small balls is converted through the horizontal distance between the position where the rigid small balls fall onto the chassis and the center of the rotary table. The collision angle and the ejection direction of the two rigid small balls are changed by rotating the angles of the two slideways, and the sum of kinetic energies of the two rigid small balls ejected in any direction is verified to be unchanged.
Further, the first slide way and the second slide way can be adjusted in height by changing different sizes. The method is used for changing the initial kinetic energy sum of the rigid small balls during collision and expanding the verification range of conservation of kinetic energy.
Furthermore, a central line is arranged on the first slide way and the second slide way. The collision angle of the two rigid small balls can be conveniently read by comparing the scale disc.
Further, an arc line is arranged on the base plate, and the circle center of the arc line is located at the center of the rotary table. The distance between the circular arc line and the center of the rotary table is recorded before the experiment, and the distance from the landing point of the rigid small ball to the center of the rotary table can be conveniently read out through the circular arc line corresponding to the landing point of the rigid small ball.
(III) advantageous effects
Compared with the prior art, the beneficial effects of the utility model are that:
1. through adjusting the included angle of the two slide ways, the collision directions of the two rigid small balls are different. The conservation of kinetic energy of two rigid small balls ejected in any direction can be verified.
2. By replacing the slide ways with different height and size, the conservation of kinetic energy of the rigid small balls with different initial kinetic energies can be verified.
Drawings
Fig. 1 is a top view of a forward structure of a kinetic energy conservation verification device according to the present invention;
fig. 2 is a side view of the kinetic energy conservation verification device according to the present invention;
fig. 3 is a diagram showing an embodiment of a kinetic energy conservation verification apparatus according to the present invention;
in the figure: 1-slide I, 2-slide II, 3-rotary table, 4-base plate, 5-rotary table I, 6-rotary table II, 7-dial, 8-rotary shaft, 9-leveling bubble, 10-leveling knob, 11-rigid ball, 12-central line and 13-circular arc line.
Detailed Description
As shown in fig. 1, 2, and 3, the present embodiment provides a kinetic energy conservation verification apparatus, including a first slide 1, a second slide 2, a turntable 3, and a chassis 4; the turntable comprises a first turntable 5, a second turntable 6 and a dial 7; the first rotating disc 5 is positioned at the bottom layer of the rotating table 3; the second rotating disc 6 is positioned in the middle layer of the rotating table 3; the dial 7 is positioned at the top layer of the turntable 3; the slideway I1 is rigidly connected with the turntable I5; the second slideway 2 is rigidly connected with the second turntable 6; the rotary table 3 is connected with the chassis 4 through a rotating shaft 8; the chassis 4 is provided with a leveling bubble 9; leveling knobs 10 are arranged at four corners of the base plate 4.
As shown in fig. 3, the operation steps of the present embodiment are as follows:
1. the chassis is kept horizontal by adjusting the leveling knob 10 and enabling the leveling bubble 9 to be positioned in the leveling center.
2. Adjusting the included angle between the first slide way 1 and the central line 12 of the second slide way 2 to be 10 degrees, measuring the mass of the two rigid small balls 11 and recording the mass as m 1 And m 2 And placing two rigid small balls 11 to the top ends of the first slideway 1 and the second slideway 2 respectively, enabling the two rigid small balls 11 to slide down simultaneously and pop up the rotary table 3 after collision occurs on the rotary table 3, and recording the first floor points of the two rigid small balls when the two rigid small balls fall on the chassis.
3. Measuring the mass m with a ruler 1 Is the distance s from the first landing point of the rigid ball 11 to the center of the turntable 3 1 (or by mass m) 1 S is read out from the circular arc line 13 corresponding to the landing point of the rigid small ball 11 1 ) Measuring mass m with a ruler 2 Is the distance s from the first landing point of the rigid ball 11 to the center of the turntable 3 2 (or by mass m) 2 S is read out from the circular arc line 13 corresponding to the landing point of the rigid small ball 11 2 ) Calculating
The result is recorded as E k1 。
4. Adjusting the included angles of the central lines 12 of the first slideway 1 and the second slideway 2 to be 20 degrees, 30 degrees and 40 degrees in sequence, repeating the steps 2 and 3, recording the result, and passing the verification E k1 ＝E k2 ＝E k3 ＝E k4 ＝E k5 And the principle of conservation of kinetic energy is verified.
5. And replacing the first slideway 1 and the second slideway 2 with the other size, repeating the steps, and verifying that the kinetic energy conservation theorem is established under the condition of any initial kinetic energy.
The above-mentioned, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (4)
1. A kinetic energy conservation verification device comprises a first slideway (1), a second slideway (2), a rotary table (3) and a chassis (4); the turntable comprises a first turntable (5), a second turntable (6) and a dial (7); the first rotating disc (5) is positioned at the bottom layer of the rotating table (3); the second rotating disc (6) is positioned at the middle layer of the rotating table (3); the dial (7) is positioned at the top layer of the turntable (3); the first slideway (1) is rigidly connected with the first rotating disc (5); the second slideway (2) is rigidly connected with the second turntable (6); the rotary table (3) is connected with the chassis (4) through a rotating shaft (8); leveling air bubbles (9) are arranged on the chassis (4); leveling knobs (10) are arranged at four corners of the base plate (4).
2. The kinetic energy conservation verification device according to claim 1, wherein: the height of the first slideway (1) and the second slideway (2) can be adjusted by changing different sizes.
3. The kinetic energy conservation verification device according to claim 1, wherein: the first slideway (1) and the second slideway (2) are provided with center lines (12).
4. The kinetic energy conservation verification device according to claim 1, wherein: an arc line (13) is arranged on the chassis (4), and the circle center of the arc line (13) is located in the center of the rotary table (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123236325.4U CN217113582U (en) | 2021-12-21 | 2021-12-21 | Kinetic energy conservation verification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123236325.4U CN217113582U (en) | 2021-12-21 | 2021-12-21 | Kinetic energy conservation verification device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217113582U true CN217113582U (en) | 2022-08-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123236325.4U Active CN217113582U (en) | 2021-12-21 | 2021-12-21 | Kinetic energy conservation verification device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217113582U (en) |
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2021
- 2021-12-21 CN CN202123236325.4U patent/CN217113582U/en active Active
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