EBK THE COSMIC PERSPECTIVE
9th Edition
ISBN: 9780135161753
Author: Voit
Publisher: VST
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Chapter 4, Problem 39EAP
To determine
To Explain:It is not possible to build a machine that can generate energy perpetually from nothing.
Claims of perpetual motion machines receives substantial media attention.
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13. You learned in Science that Energy is conserved,
that Potential Energy must balance Kinetic energy.
Mathematically, that means:
1
mgh =-mv², where mgh is Potential
%3D
Energy
1
and -mv² is Kinetic energy. Reminder that m is
2
mass, g is the acceleration due to gravity, h is
height and v is velocity.
a) Balance this equation such that the sum of
Potential and Kinetic Energy is zero (hint: gravity is
negative).
b) Solve this equation for v; again, you only need
the Algebra you've learned! (hint: don't worry about
the negative at the end!) Show your work!
+
tv
MAR
18
Instruction: Read and understand this lesson. Write your answer in a long bond paper/yellow
раper.
Problem Solving:
A. Gravitational Potential Energy
1) Climbing a vertical rope is difficult. You have to lift your full body weight with your arms.
If your mass is 60 kg and you climb 2.0 m, by how much do you increase your
gravitational potential energy?
2) Ten days after it was launched toward Mars in December 1998, the Mars Climote
Orbiter spacecraft (mass 629 kg) was 2.87 x 10 km from the earth and traveling at
1.20 x 10 km/h relative to the earth. At this time, what were:
a) The spacecraft's kinetic energy relative to the earth and
b) The potential energy of the earth-spacecraft system?
Pl:4: this was all information that was given to me. If need I would need to look it up online.
Chapter 4 Solutions
EBK THE COSMIC PERSPECTIVE
Ch. 4 - Prob. 1VSCCh. 4 - Use the following questions to check your...Ch. 4 - Use the following questions to check your...Ch. 4 - Use the following questions to check your...Ch. 4 - Use the following questions to check your...Ch. 4 - Define speed, velocity, and acceleration. What are...Ch. 4 - Define momentum and force. What do we mean when we...Ch. 4 - What is free-fall, and why does it make you...Ch. 4 - Prob. 4EAPCh. 4 - Describe the laws of conservation of momentum, of...
Ch. 4 - Define kinetic energy, radiative energy, and...Ch. 4 - Define temperature and thermal energy. How are...Ch. 4 - Prob. 8EAPCh. 4 - 9. Summarize the universal law of gravitation both...Ch. 4 - 10. What is the difference between a bound and an...Ch. 4 - What do we need to know if we want to measure an...Ch. 4 - Explain why orbits cannot change spontaneously,...Ch. 4 - Explain how the Moon creates tides on Earth. Why...Ch. 4 - What is tidal friction? What effects does it have...Ch. 4 - Does It Make Sense?
Decide whether the statement...Ch. 4 - Does It Make Sense?
Decide whether the statement...Ch. 4 - Does It Make Sense?
Decide whether the statement...Ch. 4 - Does It Make Sense?
Decide whether the statement...Ch. 4 - Prob. 19EAPCh. 4 - Prob. 20EAPCh. 4 - Does It Make Sense? Decide whether the statement...Ch. 4 - Does It Make Sense?
Decide whether the statement...Ch. 4 - Does It Make Sense?
Decide whether the statement...Ch. 4 - Does It Make Sense?
Decide whether the statement...Ch. 4 - Choose the best answer to each of the following....Ch. 4 - Choose the best answer to each of the following....Ch. 4 - Choose the best answer to each of the following....Ch. 4 - Choose the best answer to each of the following....Ch. 4 - Choose the best answer to each of the following....Ch. 4 - Prob. 30EAPCh. 4 - Prob. 31EAPCh. 4 - Choose the best answer to each of the following....Ch. 4 - Choose the best answer to each of the following....Ch. 4 - Choose the best answer to each of the following....Ch. 4 - Prob. 35EAPCh. 4 - Testing Gravity. Scientists are continually trying...Ch. 4 - Prob. 38EAPCh. 4 - Prob. 39EAPCh. 4 - Prob. 40EAPCh. 4 - Weightlessness. Astronauts are weightless when in...Ch. 4 - Units of Acceleration. If you drop a rock from a...Ch. 4 - Gravitational Potential Energy. For each of the...Ch. 4 - Prob. 44EAPCh. 4 - The Gravitational Law. How does quadrupling the...Ch. 4 - Allowable Orbits? Suppose the Sun were replaced by...Ch. 4 - Head-to-Foot Tides. You and Earth attract each...Ch. 4 - Prob. 48EAPCh. 4 - Geostationary Orbit. A satellite in geostationary...Ch. 4 - Prob. 51EAPCh. 4 - Prob. 52EAPCh. 4 - Moving Candy Bar. Table 4.1 shows that...Ch. 4 - Spontaneous Human Combustion. Suppose that all the...Ch. 4 - Fusion Power. No one has yet succeeded in creating...Ch. 4 - Understanding Newton’s Version of Kepler’s Third...Ch. 4 - Using Newton’s Version of Kepler’s Third Law....Ch. 4 - Escape Velocity. Calculate the escape velocity...Ch. 4 - Weights on Other Worlds. Calculate the...Ch. 4 - Prob. 60EAPCh. 4 - Extra Moon. Suppose Earth had a second moon,...
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