PHY 101 Lab 05 - Lab 05 Gravitation and Keplers Laws Name_Sabrina Maxwell Why everyone in this class is attracted to everyone else

# PHY 101 Lab 05 - Lab 05 Gravitation and Keplers Laws...

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Lab 05 – Gravitation and Keplers Laws Name: _Sabrina Maxwell____ Why everyone in this class is attracted to everyone else. Adapted from Chris Bier’s Collisions PhET Lab OPTION A: CREATIVE COMMONS - ATTRIBUTION Introduction: Every object around you is attracted to you. In fact, every object in the galaxy is attracted to every other object in the galaxy. Newton postulated and Cavendish confirmed that all objects with mass are attracted to all other objects with mass by a force that is proportional to their masses and inversely proportional to the square of the distance between the objects' centers. This relationship became Newton's Law of Universal Gravitation . In this simulation, you will look at two massive objects and their gravitational force between them to observe G , the constant of universal gravity that Cavendish investigated. Important Formulas: 2 2 1 d m m G F Procedure: 1. Take some time and familiarize yourself with the simulation. Notice how forces change as mass changes and as distance changes. 2. Fill out the chart below for the two objects at various distances. 3. Rearranging the equation for Force, you can CALCULATE the value of G using the values given below for m1, m2, and d, and the value for the Force that you obtain in the simulation . Record the force between the two object and then solve (calculate G) for the universal gravitation constant, G and compare it to values published in books, online, or your text book. The numbers you calculate for G will vary slightly from row to row. Remember significant digits! 15 pts I’m using distance to determine sigfigs. G=Fxd2/m1m2 Mass Object 1 Mass Object 2 Distance Force Gravitation Constant,G 50.00 kg 25.00 kg 3.0m 9.9x10^-9 9.9x10^-9 kg*m/s^2x 3m^2 50kgx25kg 9.9x10^-9 N x 9m^2 1.3x10^3 kg^2 8.9x10^-8 N*m^2 1.3x10^3 kg^2 6.8x10^-11 N*m^2/kg^2 50.00 kg 25.00 kg 4.0m 5.4x10^-9 6.5x10^-11 N*m^2/kg^2 50.00 kg 25.00 kg 5.0m 3.5x10^-9 6.8 x10^-11 N*m^2/kg^2 50.00 kg 25.00 kg 6.0m 2.4x10^-9 6.6 x10^-11 N*m^2/kg^2 50.00 kg 25.00 kg 9.0m 1.1x10^-9 6.9 x10^-11 N*m^2/kg^2 Page 1 of 5 r v a c 2 c c ma F
What do you notice about the force that acts on each object? 3 pts [The force is less with increasing distance] Average value of G: __ 6.7 x10^-11 N*m^2/kg^2__ 2 pts Units of G: __ N*m^2/kg^2__ 2 pts Published value of G: G = 6.673 x 10 -11 N m 2 /kg 2    2 pts Source: _ physics classroom__ 2 pts How did your average value of G compare to the published value for G that you found?
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