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Learning Task 6: Study the following situations and answer the question for each. Remember what you have learned about gravity and friction. Write your explanations on your answer sheet.
1. Place a book on top of a lable. What keeps the book from How is this possible?
falling? 2. Roll a marble on top of a level surface. Make it stop. Slide a light book on top of the same level surface by giving it an initial push. Did the book continue to slide? What is responsible for making the sliding
book slow down and eventually stop? 3. Drop a small stone and a piece of paper from the same height at the same time. Observe closely the motion of the stone and the paper as they fall. Which of them reached the ground first? Why did not the other one reach the ground at the same time as the first?
4. What is the importance of friction in our daily life? 5. Why do we need gravity?
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