universal gravitation compton.notebook
March 23, 2016
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universal gravitation compton.notebook
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universal gravitation compton.notebook
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universal gravitation compton.notebook
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universal gravitation compton.notebook
March 23, 2016
Newton's Law of Universal Gravitation:
F=GM1m2
r2
G: Universal Gravitation Constant
G=6.67x10-11 Nm2
kg
2
What are these units?
M1=mass of first object
m2=mass of second object
r=distance between the centers of the two
objects
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universal gravitation compton.notebook
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From this equation, there are two things that determine the
gravitational attraction between two objects. What are they?
You and your chair both have mass. Why don’t your gravitational
forces pull you together like the Earth pulls on you?
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universal gravitation compton.notebook
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Challenge: Suppose two objects attract each other with a
gravitational force of 16 N. If the distance between the
objects is reduced by a factor of 3, how much will the new
force of attraction between the two objects be?
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universal gravitation compton.notebook
March 23, 2016
Practice for your lab book:
Determine the force of gravity the Earth (M =
5.98 x 1024 kg) has on 70-kg physics student
standing at sea level, a distance of 6.38 x 106
m from earth's center.
Challenge questions:
1. Find another way to calculate this problem.
2. How much does the physics student pull on the Earth?
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universal gravitation compton.notebook
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Determine the force of gravity between the
earth (m = 5.98 x 1024 kg) and a 70-kg
physics student if the student is in an
airplane at 40000 feet above earth's
surface.
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universal gravitation compton.notebook
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