Physics of life

Author: He Dingliang
Publisher:
Publish Date: 2004-08-01
Features: In daily life, including work, sports, and games, many interesting phenomena can be analyzed and explained using physical principles. For example, when two people lift a box together to climb stairs, do both exert equal force? How do the lower limbs generate propulsion when swimming freestyle? Why do you need goggles to see underwater? Why are speakers placed inside boxes? In the game of shooting "paper bullets" with rubber bands, why use rubber bands to launch the "bullets" instead of throwing them by hand? Learning physics by using common and interesting examples can make both teachers and students teach and absorb knowledge happily and effectively. However, textbooks are limited in length, and teachers are constrained by teaching time and examination curricula, making it impossible to include many such examples. This book uses many common physical phenomena to introduce related physical principles, aiming to enhance readers' interest in physics, consolidate physical concepts, and cultivate the habit of flexibly applying physical knowledge to daily life. In recent years, the Hong Kong Secondary School Certificate Examination in physics has increased the proportion of descriptive and explanatory questions, in addition to calculation problems. This book will also help students prepare for such questions. Secondary school physics is the subject most closely related to daily life. However, textbooks are limited in length, and teachers are constrained by the examination curriculum and teaching time, making it difficult to provide many interesting examples to enhance students' interest in learning physics. As a result, many students learn physics by rote memorization of formulas and applying example problems, turning the lively and interesting learning process into abstract and tedious memorization. This book selects 134 physical problems, most of which involve common phenomena in daily life. Each question begins with a hint to guide readers in thinking, followed by a step-by-step analysis and explanation, accompanied by exquisite illustrations to aid in understanding. All physical concepts, principles, and laws cited in the text are explained in detail after the explanations, helping readers gain a clearer understanding of these physical content for the purpose of reviewing and learning new knowledge.