Electric Friction Demonstrator

• Customization: Available
• Condition: New
• Customized: Non-Customized
• Model NO.: J2715
• Material: Metal
• Type: Anatomical Model
• MOQ: 1
• Function: Suitable for Teaching and Learning
• Customer Groups: Student/Teacher/Doctor
• OEM: Accept
• Category: Teaching and Science
• Warranty: 1year
• Quality: Non-Toxic PVC
• Painting: Hand
• Size: 85cm
• Transport Package: Paper Carton
• Specification: 6pcs/carton, 74x33x52.5cm, 14kgs
• Trademark: ZHIZAO
• Origin: China
• HS Code: 9023009000

Product Description

 

Product Description

Details
Product Name: Electric friction demonstrator.

 

Material:Metal
 

 

 

J2175 friction demonstrator instruction manual
1. Describe:
Friction demonstrator is a demonstration instrument in middle school physics and mechanics. The instrument clearly demonstrates the existence and size determinants of sliding friction and static friction. The use of the instrument can make the teacher intuitively explain the difficult points in the middle school physics and
mathematics, so that the students can deepen their understanding and grasp in learning. There are the following demonstration functions for students to see:
1. Sliding friction exists when two objects contact each other and have relative motion;
2. Prove that the magnitude of sliding friction is proportional to the pressure;
3. It shows that the magnitude of sliding friction is related to the roughness of the contact surface of two objects;
4. The magnitude of the sliding friction force has nothing to do with the relative motion of the two objects;
5. When two objects contact each other and have a movement trend, there is a static friction force, and the magnitude of the static friction force increases with the increase of the external force
Big.
6. Prove that the maximum static friction is greater than the sliding friction.
This instrument is with motor, with indication, and has the function of stepless speed regulation, easy to operate, beautiful shape, is one of the necessary teaching instruments in the laboratory.
2. Main performance indicators:
1. Rated voltage: ~220V 50Hz
3. Speed regulation: stepless speed regulation
2. Motor power: 60W
4.insulation resistance greater than 20 ohms 

 

 

3.usage:
1. Place the instrument on the horizontal table, and then insert the pin under the support of the demonstration dynamometer into the hinge at the lower right corner of the box, and calibrate the demonstration dynamometer to "0".
2. Turn on the switch, the indicator light is on, and the motor rotates immediately. After the speed is stable, the light side of the wooden block is gently placed in the middle of the rubber belt. Make the inspection tape and the wood block rotate each other, then demonstrate that the dynamometer pointer moves down, indicating that there is sliding friction, indicating that the reading is the size of sliding friction.
3. The contact surface (rough surface) of the replacement block is in contact with the rubber belt, and the dynamometer pointer is slightly greater than the first time, indicating that the size of the sliding friction force is related to the roughness of the salmon surface.
4. Add a weight on the wooden block, that is, the large pressure, then the pointer reading is significantly increased, indicating that the sliding friction is proportional to the pressure.
5. Change the speed of the motor, that is, change the speed of the rubber belt, that is, change the relative motion speed of the contact surface of the two objects, and then calibrate.
6. Manual operation can be used to demonstrate static friction force and maximum static friction force.
7.the maximum static friction can also be operated by the motor, and then compared with the sliding friction.
4. Matters needing attention:
1. When using, it should be noted that the voltage is consistent with the only device voltage.
2. The device must be placed smoothly (horizontally). When demonstrating, it should be balanced and handled lightly.
3. When the motor starts, it is best to use fast gear and adjust it from fast to slow.
4. After the demonstration, remove the dynamometer, place the instrument, and store it in a ventilated and dry place

 

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