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Name: Micah Ndango Date: October 30, 2023 Lab 03 – Energy Skate Park Q1. As the skater descends, how does his kinetic energy change? Answer: As the skater descends, the kinetic energy increases. Q2. As the skater descends, how does his potential energy change? Answer: As the skater descends, the potential energy increases. Q3. How is the change in kinetic energy related to the change in potential energy? Answer: Potential energy is related to position, while kinetic energy is related to motion. When an object moves after being at rest, the potential energy is converted to kinetic energy. Change in kinetic energy will always be equal to the change in potential energy. Q4. Is the law of conservation of energy affected by the mass of the skater? Answer: The law of conservation of energy is not affected by the mass of the skater. Q5. Does the mass of the skater affect the magnitudes of the kinetic and potential energy? Answer: The mass of the skater does affect the magnitudes of the kinetic and potential energy. Q6. What is the potential energy of the 75-kg skater at a height of 5.0 m? Answer: The potential energy is 3675 at a height of 5.0 m. Q7. What is the kinetic energy of the 75-kg skater at a height of 0.0 m? Answer: The kinetic energy is 3675 J at a height of 0.0 m. Q8. On Earth, what is the potential energy of a 20-kg skater at a height of 10 m? Answer: The potential energy is 1960 J at a height of 10 m. Q9. On Earth, what is the kinetic energy of the 20-kg skater before his skate? Answer: The kinetic energy is 0 J before his skate. Q10. At the lowest point, what is the potential energy of the 20-kg skater?
Answer: The potential energy is 0 J at the lowest point. Q11. At the lowest point, what is the kinetic energy of the 20-kg skater? Answer: The kinetic energy is 1960 J at the lowest point. Q12. If the skater starts on the left side (of the diagram on page 2 of the lab instructions), will he have enough energy to make it all the way up the right side? Why, or why not? Answer: He will not have enough energy to make it to the other side because the energy is converted to thermal energy with the added friction. Use the second diagram on page 2 (labeled with positions A thru E) to answer the next three questions. Q13. At which position does the skater have the maximum kinetic energy? Answer: The skater has maximum kinetic energy at position B. Q14. At which position does the skater have the maximum potential energy? Answer: The skater has maximum potential energy at position A. Q15. At which positions will the skater have about the same speed? Answer: The skater will have the same speed at positions C and E. Q16. Describe what happens to the skater’s potential and kinetic energy on Jupiter. Answer: The skater's potential and kinetic energy will increase about 2.5 times as their potential and kinetic energy on earth. Q17. Describe what happens to the skater’s potential and kinetic energy on the Moon. Answer: The skater's potential and kinetic energy will decrease about 4 times as their potential and kinetic energy on earth. Q18. Is there potential energy in space? Why, or why not? Answer: There is no potential energy energy in space because there is no gravity. Q19. Is there kinetic energy in space? Why, or why not? Answer: There is kinetic energy in space because the objects in space are constantly moving.
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