Exploring_Gravity Remote Lab

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SUNY Westchester Community College *

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131

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Physics

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Jan 9, 2024

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pdf

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Gravity Force Lab Basics Remote Lab (This lesson is designed for a student working remotely.) This lab uses the Gravity Force Lab Basics simulation from PhET Interactive Simulations at University of Colorado Boulder, under the CC-BY 4.0 license. https://phet.colorado.edu/sims/html/gravity-force-lab-basics/latest/gravity-force-lab-basics_en.html Learning Goal: Students will investigate the variables that affect gravity. QUESTION: How does gravity affect objects? Jasmine and Emily were learning about forces in class. They learned that a force was either a push or a pull. Emily wondered if gravity was a force. She knew that when she dropped her book it was pulled down to the ground. Jasmine knew that the moon had less gravity than the earth, but she wasn’t sure why. Underline the statements you think are true: o Gravity depends on the material of the objects. o Gravity is not a force because it can’t move objects. o Gravity is a force because a force is a push or a pull. o The moon has less gravity than the Earth because it has less mass than the Earth. o The moon has less gravity than the Earth because it has no atmosphere. Background information: Variable- A variable is any factor that can be changed or controlled Independent Variable – something that is changed by the scientist What is tested What is manipulated Dependent Variable – something that might be affected by the change in the independent variable What is observed What is measured The data collected during the investigation 4/26/20 Loeblein and Borenstein https://phet.colorado.edu/en/contributions/view/4076 page 1
INSTRUCTIONS: Open up the Gravity Force Lab Basics simulation on the PhET website. https://phet.colorado.edu/sims/html/gravity-force-lab-basics/latest/gravity-force-lab-basics_en.html 1. Get familiar with the simulation by moving the figures back and forth as well as changing the mass of the spheres. 2. Underline the different variables that can be found in this simulation. Distance between figures Mass of the spheres Force Size of the figures Strength of the figures Size of spheres 3. What do you think the size of the arrows on top of each sphere represent? Think the arrows on top of each sphere represent the force. The longer the arrow is the greater the force is and the shorter the arrow the less force. 4. Pick a variable to manipulate (the independent variable). Summarize what you changed and what happened in the table below: Manipulated (Independent) Variable Dependent Variable I increased the distance between the two. fWhen I move the two objects' distance increasing the force decreases 5. Change a different variable and summarize what happens in the table below: Manipulated (Independent) Variable Dependent Variable I changed the object (mass 2 ) from 4 billion kg to 10 billion kg. When I increase the mass the gravitational force increases. Test your understanding: True or False State the correct answer and provide your reasoning 6. Gravity is a force that can be changed. T/F Yes, due to the fundamental force in nature that governs the attraction between objects with mass. 7. The bigger an object is, the smaller the force of gravity. T/F The force of gravity is directly proportional to the product of the masses of two objects. 8. As one object gets closer to another object, the force of gravity will increase. T/F The force of gravity between two objects is inversely proportional because distance between their centers. 9. The Sun has a greater gravitational force than Jupiter. T/F This is because the mass of the Sun is significantly greater than the mass of Jupiter 10. Which of the pairs has greater gravitational force? 4/26/20 Loeblein and Borenstein https://phet.colorado.edu/en/contributions/view/4076 page 2
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