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"Measuring the Mechanical Efficiency of Pulley Blocks" Mechanical and Work PPT Courseware 4
【Purpose】
1. Learn to install pulley blocks.
2. Learn to measure the mechanical efficiency of pulley blocks.
3. Learn to calculate the mechanical efficiency of a pulley block.
Discussion: In order to obtain the mechanical efficiency of the pulley block, the useful work and total work need to be found. For this purpose, what physical quantities need to be measured? How to measure each quantity?
Experimental equipment: scale, hook code, spring scale, two pulley blocks, iron stand, and string about 2m long.
What is the first thing to do when using a spring dynamometer?
Measuring the gravity of the hook code using a spring dynamometer
Pull the spring scale at a constant speed to raise the hook code to a certain position, and read the value of the pulling force F from the spring scale.
The height of the hook code rising (h)
The distance traveled by the free end of the string (s)
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For more information about the "Mechanical Efficiency of Mechanical and Dynamic Measurement of Pulley Blocks" PPT courseware, please click the Mechanical Efficiency of Mechanical and Dynamic Measurement of Pulley Blocks ppt tag.
"Measuring the Mechanical Efficiency of Pulley Blocks" Mechanical and Work PPT Courseware 3:
"Measuring the Mechanical Efficiency of Pulley Blocks" Mechanical and Work PPT Courseware 3 Preview Tips 1. A pulley block is used to lift a weight of 20 N so that it rises 0.4 meters. The pulling force acting on the free end of the rope is 8 N. The point of action of the pulling force rises 1.2 meters. The work done by the pulling force on the pulley is ____..
"Measuring the Mechanical Efficiency of Pulley Blocks" Mechanical and Work PPT Courseware 2:
"Measuring the Mechanical Efficiency of Pulley Blocks" Mechanical and Work PPT Courseware 2 Learning Objectives: 1. Further understand the concepts of useful work, additional work, total work and mechanical efficiency; 2. Be able to use the mechanical efficiency formula to perform simple calculations; 3. Be able to measure Mechanical efficiency, knowing how to improve mechanical...
"Measuring the Mechanical Efficiency of Pulley Blocks" Mechanical and Work PPT Courseware:
"Measuring the Mechanical Efficiency of the Pulley Block" Mechanical and Work PPT Courseware Discussion: 1. What is the principle of measuring the mechanical efficiency of the pulley block? Measurement principle: h=Whas/Wtotal=Gh/Fs 2. What are the physical quantities that need to be measured to measure the mechanical efficiency of the pulley block? G ---- Gravity of an object..