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Anonymous users2024-02-11The most inconsistent physics problem I encountered was how gravity can become friction on a fixed pulley. What exactly is the relationship between gravity and mechanical efficiency of moving pulleys? Estimate how many seconds the national anthem will take.
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Anonymous users2024-02-10Classmates, I will talk about the first question first, the first question you must have a poor understanding of the phrase "when the rod is falling freely", the purpose of this sentence is to tell you that the rod is falling vertically, the initial velocity is 0, and it is not subject to air resistance, these are the definitions of "free fall" are also the conditions that secretly tell you, otherwise you don't know how the rod falls.
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Anonymous users2024-02-09I think the most unrealistic physics problem I've ever done myself would be two people playing seesaw on the left and right, and then one person would bounce away.
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Anonymous users2024-02-08The mass of a book is 300 grams, and then the volume of a book is 80, the height of the table is eighty, and there are some principles of electricity connection, and the volume of an apple.
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Anonymous users2024-02-07I think Archimedes said, "Give me a fulcrum, and I can pry up the whole earth." "I've always felt that this is very unreliable, because there is no such pivot in the world.
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Anonymous users2024-02-06I think that as a liberal arts student, I think there are too many physics questions that are not in line with reality, and I think that physics is a problem that does not conform to reality, and there are all kinds of electricity and the like.
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Anonymous users2024-02-05Ignore the phrase drag (or friction).
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Anonymous users2024-02-04Once I did a question on the teacher's PPT, and found that the speed of the big truck was 150 meters per second, which was almost Mach.
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Anonymous users2024-02-03Xiao Ming and his teacher ran to the rooftop and threw the plastic and iron blocks down together, the same quality, to see if the colleague landed, I don't think it can be realized, and it will fall in an instant that is invisible to the naked eye.
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Anonymous users2024-02-02The wooden stakes at the bottom of the pond are not without buoyancy, but are pulled by the friction of the soil! Of course, in the ponds that rely on the waterproof layer to store water in the arid places of the north, the wooden stakes that penetrate the waterproof layer are really not buoyant! If the Three Gorges Dam is designed without buoyancy, it is a low-level joke! Haha
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