Lab 05 – Gravitation and Keplers L Name: _Nhat-Vy Doan-Nguyen____________________Why everyone in this class is attracted to everyone else.https://phet.colorado.edu/en/simulation/gravity-force-labAdapted from Chris Bier’s Collisions PhET Lab OPTION A: CREATIVE COMMONS - ATTRIBUTIONIntroduction:Every object around you is attracted to you. In fact, every object in the galaxy isattracted to every
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Lab 05 – Gravitation and Keplers L Name: _Nhat-Vy Doan-Nguyen____________________
Why everyone in this class is attracted to everyone else.
https://phet.colorado.edu/en/simulation/gravity-force-lab
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
1 2
d
m m
F G
Procedure: https://phet.colorado.edu/en/simulation/gravity-force-lab
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
Mass Object 1 Mass Object 2 Distance Force Gravitation Constant,G
50.00 kg 25.00 kg 3.0m 0.000000009394
N 6.76368e-11
50.00 kg 25.00 kg 4.0m 0.000000005162
N 6.60736e-11
50.00 kg 25.00 kg 5.0m 0.000000003337
N 6.674e-11
50.00 kg 25.00 kg 6.0m 0.000000002294
N 6.60672e-11
50.00 kg 25.00 kg 9.0m 0.000000001025
N 6.642e-11
What do you notice about the force that acts on each object? 3 pts
The force acts on both objects equally regardless of their mass
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v r
a
c
2
Fc mac
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