Скачать с ютуб Conceptual Questions Chapter 4 Work and Energy l First Year Physics Federal Board KPK Syllabus в хорошем качестве

Conceptual Questions Chapter 4 Work and Energy l First Year Physics Federal Board KPK Syllabus

Give a short response to the following questions 1. A bucket is taken to the bottom of a well, does the bucket possess any P.E? Explain. 2. When an arrow is shot from its bow, it has K.E. From where does it get the K.E.? 3. Does a hydrogen filled balloon possess any P.E? Explain. 4. Is K.E a vector quantity? 5. What happens to K.E of a bullet when it penetrates into a target? 6. Does the tension in the string of a swinging pendulum do any work? Explain. 7. A meteor when enters into the Earth’s atmosphere burns. What happens to its energy? 8. What type of energy is stored in the spring of watch? 9. A man drops a cup from a certain height, which breaks into pieces. What energy changes are involved? 10. A man rowing boat upstream is at rest with respect to shore, is he doing work? 11. Why energy savers are used instead of normal bulbs?