Ch 15 Lab Gravity

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Physics

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Feb 20, 2024

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©eScience Labs, 2017 Gravity PRE-LAB QUESTIONS 1. If you replace the Sun with a black hole of the same mass as the Sun, what will happen to the Solar System planets? a. They will be sucked into the black hole. b. Some planets will be sucked into the black hole, but not all of them. c. They will continue to orbit as normal. d. None of the above 2. If you go to the Moon, with its surface gravity of 1.6 m/s 2 , which of the following is true? a. Your weight will be smaller than on Earth. b. Your mass will be smaller than on Earth. c. Your weight will be larger than on Earth. d. Your mass will be larger than on Earth. 3. Which of the following experiences the strongest gravitational pull from the Earth? a. A plane flying at 30,000 feet. b. A satellite in a low-Earth orbit. c. A person standing at the top of the Burj Khalifa skyscraper. d. A seagull walking the beach in California. 4. If you climb mount Everest (at ~9 km above sea-level) one day and then go visit the bottom of the Mariana Trench (~11 km below sea-level), what will the ratio between your high-altitude and low-altitude weight be, assuming Earth’s radius is 6,400 km? a. !"#$ !%&$ b. !%&$ !"#$ c. ! !"#$ !%&$ " d. ! !%&$ !"#$ "
©eScience Labs, 2017 Gravity EXERCISE 1: NEWTON’S LAWS OF GRAVITATION Data Sheet Table 1. Water Observations Procedure Observation Releasing your finger from the hole in the bottom of the cup: Releasing your finger and dropping the cup at the same time: Any additional observations: Table 2. Measurements From the 30° Inclined Plane Measurement # Marble Rolling Time (s) Ping Pong Ball Rolling Time (s) Golf Ball Rolling Time (s) Tennis Ball Rolling Time (s) 1 2 3 4 5 Average: Standard Deviation:
©eScience Labs, 2017 Gravity Table 3. Measurements from the 60° Inclined Plane Measurement # Marble Rolling Time (s) Ping Pong Ball Rolling Time (s) Golf Ball Rolling Time (s) Tennis Ball Rolling Time (s) 1 2 3 4 5 Average: Standard Deviation: Table 4. Weight of the Balls Measurement # Marble (g) Ping Pong Ball (g) Golf Ball (g) Tennis Ball (g) 1 2 3 Average: Standard Deviation:
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©eScience Labs, 2017 Gravity Exercise 1 Post-Lab Questions 1. Compare and contrast your average rolling times for the balls between the 30° incline and the 60° incline. Marble: Ping Pong ball: Golf ball: Tennis ball: 2. Examine the relative sizes (diameters) of the balls and your measurements in Tables 2 and 3. Did your results demonstrate that larger objects fall faster than small objects? Explain why or why not. 3. Fill out Table 5 with your results from Exercise 1. According to your results, is there any correlation between the weight of the ball and how fast it rolled down the incline? Explain your reasoning. Table 5. Exercise 1 Results Measurement Marble Ping Pong Ball Golf Ball Tennis Ball Average Rolling Time (30°): Average Rolling Time (60°): Average Weight: 4. Were there any variables that were not accounted for in this exercise that could have impacted your results? If yes, describe them and how they could have impacted your results. 5. What are some possible sources of error in this exercise? How would you alter the exercise to minimize these errors?