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Junior high school physics on the rod, pulley, some knowledge of mechanical efficiency It's better to be more detailed, formula, definition of everything! And hope to add some ideas to do this kind of topic
What is fulcrum, power, resistance, power arm, resistance arm? (1) fulcrum: the point around which the lever rotates (o) (2) power: the force that causes the lever to rotate (F1) (3) resistance: the force that prevents the lever from rotating (F2) (4) power
RELATED INFORMATIONS
- 1. G = mg, what does the formula mean?
- 2. What formula is a = μ mg / M
- 3. The physical meaning of G = mg
- 4. The magnitude of gravity can be expressed by the formula g = mg, (g =) g How to fill in the brackets and what do they mean What do you mean by (g =) g and this
- 5. For the formula g = mg, G is proportional to () G is gravity, g = 9.8n/kg, M is mass
- 6. Correct understanding of gravity formula g = mg To be concise... In their own words, urgent ~! ~! Chemical experts to help
- 7. For the formula g = mg, the correct understanding is A. An object with a mass of 1kg weighs 9.8N B. The weight of a thing is 9.8 times its mass C. The weight g is proportional to g D. The weight g is proportional to M
- 8. The formula of gravity calculation g = mg. G = g / m, read as (), its physical meaning is () the weight of a junior high school student is close to () The equilibrium state of an object means that the object is in the state of uniform linear motion or static state. In this state, the object is subjected to () force () =Don't ignore the supplementary questions And I seem to have copied the wrong question = = not g = g / m, because it should be g = 9.8n/kg
- 9. The formula of gravity g = mg, M =?
- 10. Why is the pressure difference f in physical buoyancy equal to f lower surface - f upper surface
- 11. Summary of all knowledge points of junior high school physics The knowledge points are clear, don't copy, summarize well,
- 12. Who can summarize the junior high school physics inside about the pulley block, the lever aspect knowledge? Better be more detailed
- 13. Junior high school physics knowledge
- 14. How to draw the section number of the rope around the movable pulley in the pulley block More detailed Oh! Had better have schematic diagram
- 15. The formula of moving pulley in junior high school physics Calculation of mechanical efficiency
- 16. Pulley blocks. Formula for the number of rope segments
- 17. Do you have any key points? It's formulas, and some fallible knowledge
- 18. The vertices a (- 1,2), B (2,1), C (4,3) of the parallelogram ABCD are known The vertices a (- 1,2), B (2,1), C (4,3) of the parallelogram ABCD are known (1) Find the coordinates of the fourth vertex D (2) Coordinates of the intersection of diagonal lines AC and BD fast
- 19. When an object moves or rotates, its () and () remain unchanged
- 20. According to the design requirements, the distance between the transmission tower P and two towns a and B must be equal, and the distance between the transmission tower P and two expressways m and N must also be equal. Please make the location of the transmission tower P in the drawing. (ruler drawing, do not write the method, keep the trace of drawing.)