3B Scientific UE1020200 First and Second Class Levers Balance Scales Instruction Manual
- June 7, 2024
- 3B Scientific
Table of Contents
3B Scientific UE1020200 First and Second Class Levers Balance Scales
Product Information
Specifications
- Product Code: UE1020200
- Product Name: Lever Precision Dynamometer
- Types: First-Class Lever, Second-Class Lever
- Force Capacity: 2N (Precision Dynamometer 2 N), 5N (Precision Dynamometer 5 N)
Equilibrium of Moments
- For both types of levers, the law of the lever follows from the equilibrium of moments equation:
- F1 x d1 = F2 x d2
- This equation represents the physical basis for mechanical force transmission.
FAQ
- Q: What is the purpose of using a lever precision dynamometer?
- A: The lever precision dynamometer is used to verify the law of the lever and understand mechanical force transmission principles.
- Q: How many classes of levers does the product support?
- A: The product supports two classes of levers – first-class and second-class levers.
EXPERIMENT PROCEDURE
- Measure the force F1 as a function of the load F2, the distance between the load and the fulcrum x2 and the distance between the force and the fulcrum x1 for a second-class lever.
- Measure the force F1 as a function of the load F2, the distance between the load and the fulcrum x2 and the distance between the force and the fulcrum x1 for a first-class lever.
OBJECTIVE
- Verification of the law of the lever
SUMMARY
- The law of the lever follows from the equilibrium of moments, which works for all three classes of lever.
- It represents the physical basis for all kinds of mechanical transmission of force.
REQUIRED APPARATUS
Quantity Description Item Number
- 1 Lever 1008539
- 1 Precision Dynamometer 2 N 1003105
- 1 Precision Dynamometer 5 N 1003106
BASIC PRINCIPLES
A lever is a fixed body that can rotate around a fixed axis and can be used to lift and move loads. A force or effort is applied at a certain point from the fulcrum to move a load or resistance at another point along the lever. With a second-class lever, the effort F1 and load F2 are both on the same side of the fulcrum and both forces act in opposite directions. With a first-class lever, the forces are on different sides of the fulcrum and are both directed the same way.
- For both types, the law of the lever follows from the equilibrium of moments:
- (1) F1· x1 = F2 · x2
- This represents the physical basis for all kinds of mechanical transmission of force.
EVALUATION
- From the values measured, calculate in each case the products
- F1· x1 and F2 · x2 and make a comparison between them.
MECHANICS | FORCE | First- and Second-Class Levers
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