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High school physics mechanics force analysis is not very good, how can we improve physics
Remember the force analysis, be sure to analyze the force on your research object, don't look at the force applied
There are always forces and objects under force. When you have carried out force analysis, you must see if those forces have objects under force. If not, it must be wrong
In addition, according to the order of gravity, support force and friction force, the force analysis is carried out
Physics is actually very easy to learn. Don't feel embarrassed. Come on, pay more, especially if you don't get good grades in physics
Everyone can learn physics well
The mechanics and force analysis of senior one physics is so difficult and abstract. How do you learn it?
First of all, clear concept, concept to do intensive reading, word by word
Secondly, the common, basic mechanics, practice to remember, the best understanding
Finally, compare the correct method with the concept of the textbook, and understand what people ask
Physics is to use the formulas in books to solve problems
Prepare a correction book
As shown in the figure, place a wedge-shaped object a on a smooth fixed inclined plane with an inclination angle of θ. Its upper surface is horizontal and its mass is m. The mass of object B is m. place B on top of a and fix a with hand first (1) If the upper surface of a is rough, after letting go, find AB is relatively static and slides along the inclined plane together, and the pressure of B on A. (2) if the upper surface of a is smooth, find the pressure of B on a at the moment after letting go
(1) When a = GSIN θ, the vertical component of B's acceleration ay = GSIN 2 θ, then mg-N = may n = mg-mgsin 2 θ = mgcos 2 θ
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