Schematic of system
1. Adjust knob, 2. Arm, 3. Hook, 4. Spring, 5. Initial weights, 6. Pointer, 7. Hook, 8. Mirror, 9. Weight tray, 10. Vernier, 11. Ruler, 12. Leveling screw, 13. Weights 14. Magnet, 15. Integrated Hall switch sensor, 16. Wiring socket, 17. Counter display, 18. Timer display, 19. Reset button, 20. Set/View button, 21. Trigger indicator LED.
Features
High accuracy timing device
High accuracy reading device
Affordable
Introduction
The LEMI-21 Simple Harmonic Motion and Spring Constant Apparatus combines two innovative devices to provide an enhanced and precise experimental experience. These devices include: (1) A Jolly balance with a reading device that incorporates a pointer and a reflective mirror with a vernier scale, and (2) A timing device featuring an integrated Hall switch sensor.
This design significantly improves upon traditional apparatus, offering greater accuracy and reliability. Through these experiments, students will explore the fundamental principles of simple harmonic motion (SHM) in a spring system, particularly the relationship between force, displacement, and vibrational period. This apparatus is an excellent tool for general physics teaching and hands-on learning.
The LEMI-21 allows users to conduct the following experiments:
1. Verify Hooke's Law: Measure the stiffness coefficient of a spring by analyzing the relationship between force and displacement.
2. Study Simple Harmonic Motion: Investigate the motion of a spring oscillator, measure its period, and calculate the spring's stiffness coefficient.
3. Explore the Hall Switch: Study the properties and operational method of the Hall switch sensor, and how it integrates with the timing mechanism.
This apparatus helps students understand the theoretical foundation of Hooke's Law and its application in spring systems, analyze the dynamics of simple harmonic motion and its relation to spring constants, and learn to use advanced measurement techniques, including the Hall switch sensor for precise timing.
The detailed instruction manual includes experimental configurations and setup instructions, clear explanations of theoretical principles, step-by-step guidance for conducting experiments, and sample results for analysis and comparison.
Please click Experiment Theory and Contents to find more information about this apparatus. The LEMI-21 Simple Harmonic Motion and Spring Constant Apparatus is an invaluable educational tool that combines precision with practical learning, enhancing the study of fundamental physics concepts.
Parts and Specifications
| Description | Specifications |
| Jolly balance ruler | Range: 0 ~ 551 mm; reading accuracy: 0.02 mm |
| Counter/ timer | Accuracy: 1 ms, with storage function |
| Spring | Wire diameter: 0.5 mm; outer diameter: 12 mm |
| Integrated Hall switch sensor | Critical distance: 9 mm |
| Small magnetic steel | Diameter: 12 mm; thickness: 2 mm |
| Weight | 1 g (10 pcs), 20 g (1 pc), 50 g (1 pc) |
Schematic of system
1. Adjust knob, 2. Arm, 3. Hook, 4. Spring, 5. Initial weights, 6. Pointer, 7. Hook, 8. Mirror, 9. Weight tray, 10. Vernier, 11. Ruler, 12. Leveling screw, 13. Weights 14. Magnet, 15. Integrated Hall switch sensor, 16. Wiring socket, 17. Counter display, 18. Timer display, 19. Reset button, 20. Set/View button, 21. Trigger indicator LED.
