Gravity, the force that an object receives due to the attraction of the earth. Gravity is the center of the earth. The direction of gravity is always vertical downward.
The gravity of an object is directly proportional to its mass. The calculation formula is: G=mg, g is the proportional coefficient, and the gravity is about 9.8N/kg. Gravity varies with latitude, that is to say, the weight of an object with a mass of 1kg is 9.8N, and the point where gravity acts on the object is called the center of gravity.
Learn physics methods well
Preview what the teacher will say in advance. Many people don't understand what this step is for. Of course, this is not to increase your sense of superiority in class, but to let you know what you want to learn. Your first thought will reduce your reaction time in class and gain more time to think and solve doubts.
To strengthen memory, we should memorize basic concepts, laws and some basic conclusions, which is what we often call the most basic knowledge.
Students often ignore the memory of these basic concepts and think that learning physics does not need to memorize these literal things. As a result, few students, even those in cram schools, can accurately state their physical concepts in the review of senior three. I can't absolutely say that the incomplete memorization of physical concepts will have much impact on your study in a certain exam or at a certain stage.
But it is certain that this has an inherent adverse effect on your understanding of physical problems and the formation of your knowledge of the whole physical system. You can't tell which question in any exam will lose points because of your inaccurate concept.
Therefore, learning Chinese requires memorizing famous sayings and epigrams, learning mathematics requires memorizing basic formulas, and learning physics also requires memorizing basic concepts and laws. This is the first premise and the most basic requirement to learn physics well. Without this step, the following study is impossible.