College Physics
1st Edition
ISBN: 9781938168000
Author: Paul Peter Urone, Roger Hinrichs
Publisher: OpenStax College
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Textbook Question
Chapter 6, Problem 42PE
Unreasonable Result
A mountain 10.0 km from a person exerts a gravitational force on him equal to 2.00% of his weight.
(a) Calculate the mass of the mountain.
(b) Compare the mountain's mass with that of Earth.
(c) What is unreasonable about these results?
(d) Which premises are unreasonable or inconsistent? (Note that accurate gravitational measurements can easily detect the effect of nearby mountains and variations in local geology.)
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Question 5 of 20
The table shows data for four planetary bodies. If your mass is 68.05 kg, how
much gravitational force would you experience on the surface of Mercury?
Gmim2 The gravitational constant
Newton's law of gravitation is F,
gravity
Gis 6.67 x 10-11 N•m2/C2. (For the purposes of calculating the gravitational
force between a planet and an object on its surface, the distance ris the
radius of the planet.)
Planetary body
Mass, kg
Radius, m
Earth
5.97 x 1024
6.37 x 106
Moon
7.35 x 1022
1.74 x 106
Mars
6.42 x 1023
3.39 x 106
Mercury
3.30 x 1023
2.44 x 106
О А. 92.1 N
Ов. 110 N
О С. 254 N
O D. 252 N
Apply: Suppose an elephant has a mass of 1,800 kg and a person has a mass of 75 kg. If the strength of
gravitational force on the person was 735 N, what would be the gravitational force on the elephant?
Assume both the person and elephant are on Earth's surface.)
I Since force and mass are proportional, set this up as a proportion/ratio.
(mass of elephant)
(mass of human)
(force on elephant)
(force on human)
%3D
Show your work (to insert math notation, go to the Toolbar and click on Insert -
Equation):
Answer:
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Chapter 6 Solutions
College Physics
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