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Understanding Hooke's Law: The Foundation of Elasticity| Chapter 5 Physics 9th

HOOKE'S LAW   Introduction In physics, Hooke's Law is one of the fundamental principles governing how objects deform under external forces . Named after the 17th-century British physicist Robert Hooke, this law provides a crucial understanding of the behavior of elastic materials, such as springs and rubber bands. Whether stretching a rubber band or compressing a spring, Hooke's Law helps explain what happens when forces act on these materials. What is Hooke's Law: Hooke's Law states that the force F needed to extend or compress a spring by some distance x is proportional to that distance. Mathematically, it is expressed as: F= -kx Here k represents the spring constant, which is the measure of the stiffness of the spring, and x is the displacement from the displacement position.  The negative sign indicates that the force exerted by the spring is in the opposite direction of the displacement.  Understanding the Spring Constant: The spring constant k is a critical co

Unit 8: People and Places : Ghazi's Diary

 GHAZI'S DIARY CRITICAL SUMMARY This entry is written by Mr. Ghazi in his diary who has shifted to Karachi city. Although, the city has clean streets, big houses, beautiful gardens, he missed his village. In village, he had a house of three rooms with no boundary wall in which his grandparents, two of my unmarried aunts, his uncle with family, his parents siblings lived. The city house is made of cement and painted with tiled floors. The houses in the village were all made of wood, straw and mud. They had no furniture. The village did not have roads or streets but narrow mud lanes. People did not need transport, they just walked. The village had a few small shops. Men spent their free time in the village Otaq. The women had the village well which was the center of all their activities village men and women didn't use television, Facebook, YouTube, SMS or email. The writer then wished him to take him back to his simple village life. WE NEED TO STORE RAIN WATER The second ent