EBK CONCEPTUAL PHYSICAL SCIENCE
6th Edition
ISBN: 8220101459787
Author: Hewitt
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 4, Problem 113DQ
Some people dismiss the validity of scientific theories by saying they are "only" theories. The law of universal gravitation is a theory. Does this mean that scientists still doubt its validity? Explain.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Q.3
=
a. What is the difference between the force in F =ma (Newton's 2nd law) and F
Gm₁m₂/d²2 (Newton's law of universal gravitation).
b. Find the net force on a Planet A of mass 3.0 x 10¹ kg due to the gravitational
attraction of both Planet B of mass 4.9 x 10²⁰ kg and the Sun of mass 2.1 x 10³⁰ kg,
assuming they are at right angles to each other. The distance of Planet A from
Planet B is 5.0 x 107 m and distance of the Sun from the Planet A is 5.8 x 106 m.
G= 6.67 x 10¹¹ N.m²/kg².
-11
You may have an image of Sir Isaac Newton sitting under a tree and after being hit on the head by an apple he suddenly "discovered" the Law of Universal Gravitation. In fact, the theory was a result of years’ worth of research, which in turn was based on centuries of accumulated knowledge. He is credited with determining that the following relationship is universal. The gravitational attraction between two objects varies jointly with their masses (m1 and m2) and inversely with the square of the distance (d) between them. By what percent does the force of gravitational attraction change if one mass is increased by 20%, the other mass decreased by 20%, and the separation is reduced by 25%?
.
Chapter 4 Solutions
EBK CONCEPTUAL PHYSICAL SCIENCE
Ch. 4 - What did Newton discover about gravity?Ch. 4 - In what sense does the Moon fall?Ch. 4 - State Newtons law of universal gravitation in...Ch. 4 - What is the magnitude of gravitational force...Ch. 4 - What is the magnitude of the gravitational force...Ch. 4 - How does the force of gravity between two bodies...Ch. 4 - Prob. 7RCQCh. 4 - Would the springs inside a bathroom scale be more...Ch. 4 - Would the springs inside a bathroom scale be more...Ch. 4 - Explain why occupants of the international Space...
Ch. 4 - Under what conditions is your weight equal to mg?Ch. 4 - What was the cause of perturbations discovered in...Ch. 4 - The perturbations of Uranus led to what greater...Ch. 4 - What is the status of Pluto in the family of...Ch. 4 - Which is thought to be more prevalent in the...Ch. 4 - A stone is thrown upward at an angle. Neglecting...Ch. 4 - A stone is thrown upward at an angle. Neglecting...Ch. 4 - A projectile is launched upward at an angle of 75...Ch. 4 - A projectile is launched vertically at 100 m/s. If...Ch. 4 - What connection does Earth's curvature have with...Ch. 4 - Why is it important that a satellite remain above...Ch. 4 - When a satellite is above Earths atmosphere, is it...Ch. 4 - If a satellite were beyond Earths gravity, what...Ch. 4 - Why doesnt the force of gravity change the speed...Ch. 4 - Why doesnt the force of gravity change the speed...Ch. 4 - Is the period longer or shorter for orbits of...Ch. 4 - Why does the force of gravity change the speed of...Ch. 4 - Prob. 28RCQCh. 4 - Prob. 29RCQCh. 4 - A space vehicle can outrun Earth's gravity, but...Ch. 4 - F=Gm1m2d2 Using the formula for gravity, show that...Ch. 4 - F=Gm1m2d2 Calculate the force of gravity on the...Ch. 4 - F=Gm1m2d2 Show that the average force of gravity...Ch. 4 - F=Gm1m2d2 Show that the force of gravity between...Ch. 4 - F=Gm1m2d2 Show that the force of gravity between a...Ch. 4 - F=Gm1m2d2 Calculate the force of gravity between a...Ch. 4 - Suppose you stood atop a ladder that was so tall...Ch. 4 - Show that the gravitational force between two...Ch. 4 - Show that there is no change in the force of...Ch. 4 - Find the change in the force of gravity between...Ch. 4 - Consider a pair of planets in which the distance...Ch. 4 - Many people mistakenly believe that the astronauts...Ch. 4 - Newtons universal law of gravity tells us that...Ch. 4 - An airplane is flying horizontally with speed 1000...Ch. 4 - A ball is thrown horizontally from a cliff at a...Ch. 4 - A satellite at a particular point along an...Ch. 4 - A rock thrown horizontally from a bridge hits the...Ch. 4 - A baseball is tossed at a steep angle into the air...Ch. 4 - A penny on its side moving at speed v slides off...Ch. 4 - Students in a lab measure the speed of a steel...Ch. 4 - The planet and its moon gravitationally attract...Ch. 4 - Consider the light of multiple candle flames, each...Ch. 4 - Rank, from greatest to least, the average...Ch. 4 - A ball is tossed off the edge of a cliff with the...Ch. 4 - The dashed lines show three circular orbits about...Ch. 4 - The positions of a satellite in elliptical orbit...Ch. 4 - What would be the path of the Moon if somehow all...Ch. 4 - Is the gravitational force greater on a 1-kg piece...Ch. 4 - Consider a space pod somewhere between Earth and...Ch. 4 - An astronaut lands on a planet that has the same...Ch. 4 - An astronaut lands on a planet that has the same...Ch. 4 - If Earth somehow expanded to a larger radius, with...Ch. 4 - How would the force between a planet and its moon...Ch. 4 - Phil work on the 15th floor of an office building,...Ch. 4 - In 2013, Curiosity landed on the surface of Mars....Ch. 4 - Earth is not exactly a sphere but, rather, bulges...Ch. 4 - A small light source located 1 m in front of a...Ch. 4 - Prob. 73ECh. 4 - Why do the passengers in high-altitude jet planes...Ch. 4 - To begin your wingsuit flight, you step off the...Ch. 4 - In synchronized diving, divers remain in the air...Ch. 4 - What two forces act on you while you are in a...Ch. 4 - If you were in a freely falling elevator and you...Ch. 4 - In the 2014 Rosetta mission, a probe from Earth...Ch. 4 - How does the size of Pluto compare with that of...Ch. 4 - Elements beyond the naturally occurring elements...Ch. 4 - Earth and the Moon are gravitationally attracted...Ch. 4 - Chuck Stone releases a ball near the top of a...Ch. 4 - In the absence of air resistance, why does the...Ch. 4 - At what point in its trajectory does a batted...Ch. 4 - A heavy crate accidentally falls from a...Ch. 4 - Two golfers each hit a ball at the same speed, but...Ch. 4 - When you jump upward, your hang time is the time...Ch. 4 - The hang time of a basketball player who jumps a...Ch. 4 - If youve had the good fortune to witness the...Ch. 4 - Newton knew that if a cannonball were fired from a...Ch. 4 - Satellites are normally seat into orbit by firing...Ch. 4 - Hawaii presents the most efficient launching site...Ch. 4 - Does the speed of a falling object depend on its...Ch. 4 - Prob. 95ECh. 4 - What is the shape of the orbit when the velocity...Ch. 4 - If a flight mechanic drops a box of tools from a...Ch. 4 - How could an astronaut in a space vehicle drop an...Ch. 4 - If you stopped an Earth satellite dead in its...Ch. 4 - Prob. 100ECh. 4 - At what point in Earths elliptical orbit about the...Ch. 4 - The force of gravity on an Earth satellite in...Ch. 4 - Earth is farthest away from the Sun in July and...Ch. 4 - In the 2014 Rosetta mission, when a probe from...Ch. 4 - An object tossed vertically will reach a maximum...Ch. 4 - Comment on whether or not the following label on a...Ch. 4 - Newton tells us that gravitational force acts on...Ch. 4 - "Okay," a friend says, "gravitational force is...Ch. 4 - An apple falls because of its gravitational...Ch. 4 - Jupiter is more than 300 times as massive as...Ch. 4 - When will the gravitational force between you and...Ch. 4 - Explain why the following reasoning is wrong. "The...Ch. 4 - Some people dismiss the validity of scientific...Ch. 4 - Shruti Kumar projects a ball at an angle of 30...Ch. 4 - A friend claims that bullets fired by some...Ch. 4 - A park ranger shoots a monkey hanging from a...Ch. 4 - Which requires more fuel: a rocket going from...Ch. 4 - Two facts: A freely falling object at Earth's...Ch. 4 - A new member of your discussion group says that,...Ch. 4 - A friend says that astronauts inside the...Ch. 4 - Another new member of your discussion group says...Ch. 4 - Occupants inside future donut-shaped rotating...Ch. 4 - A satellite can orbit at 5 km above the Moon's...Ch. 4 - As part of their training before going into orbit,...Ch. 4 - Prob. 125DQCh. 4 - A communications satellite with a 24-h period...Ch. 4 - This situation should elicit good discussion: In...Ch. 4 - (Here's a Chapter 2-type question): When the brake...Ch. 4 - (Here's a Chapter 4-type question): The first...Ch. 4 - Here's a situation to challenge you and your...Ch. 4 - Choose the BEST way to complete the statement. 1....Ch. 4 - The force of gravity between two planets depends...Ch. 4 - Inhabitants of the International Space Station ate...Ch. 4 - A spacecraft on its way from Earth to the Moon is...Ch. 4 - Theoretically, a baseball tossed horizontally in a...Ch. 4 - When no air resistance acts on a projectile, its...Ch. 4 - Without air resistance, a ball tossed at an angle...Ch. 4 - When you toss a projectile sideways, it curves as...Ch. 4 - A satellite in elliptical orbit about Earth...Ch. 4 - A satellite in Earth orbit is mainly above Earth's...
Additional Science Textbook Solutions
Find more solutions based on key concepts
Whether the average speed for the entire trip greater than, less than or equal to 20 m/s .
Physics (5th Edition)
A ball rebounds elastically from the floor. What doesthis situation share with the ideas of momentum conservati...
Modern Physics
31. (I) A novice skier starting from rest, slides down an icy frictionless 8.0° incline whose vertical height i...
Physics: Principles with Applications
Fluid originally flows through a tube at a rate of 100 cm3/s. To illustrate the sensitivity of flow rate to var...
College Physics
Archimedes purportedly used his principle to verify that the kings crown was pure gold by weighing the crown su...
Essential University Physics: Volume 1 (3rd Edition)
A uniform wire of resistance R is stretched until its length doubles. Assuming its density and resistivity rema...
Essential University Physics: Volume 2 (3rd Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- Suppose the gravitational acceleration at the surface of a certain moon A of Jupiter is 2 m/s2. Moon B has twice the mass and twice the radius of moon A. What is the gravitational acceleration at its surface? Neglect the gravitational acceleration due to Jupiter. (a) 8 m/s2 (b) 4 m/s2 (c) 2 m/s2 (d) 1 m/s2 (e) 0.5 m/s2arrow_forwardPlease help with the following questions as they are related to one another. Thank you very much!arrow_forward6.) Planet X has 10 times the mass of the Earth’s mass. The star that it orbits has the same mass as our Sun.The planet average distance from its star is 2.5826 (10)11 ??.a) What is the gravitational force between Planet X and its star in units of Newtons?b) What is the velocity of Planet X as it orbits its star in units of metres per second?arrow_forward
- 1) Give the following numbers to four significant figures in scientific notation: a) 0.0056542b) 93 842 773c) 0.000000100092d) 0.0095435 2) Repeat part (1), but this time give the numbers to two significant figures. 3) The radial acceleration, a, of a body rotating in a circle of radius r at constant speed v is given by ? =v2/rIf v = (3.00±0.05) m/s and r = (1.5±0.1) m, a) calculate a,b) the maximum values of a, c) minimum values of a, d) the uncertainty in a. 4) Linearize the following equations (rearranged in the form y = mx + c): a) ? = ?? , where F is the dependent variable, N is the independent variable and µ is the constant. b) ? = 2?√(?⁄?) where T is the dependent variable, l is the independent variable and g is the constant.i) What would you plot in order to obtain a straight line)? (Answer for a) and b)ii) How are the slope and intercept related to the constants in the equation? (Answer for a) and b)arrow_forwardYou are to solve this problem using only the tools of dimensional analysis. You are not expected to know anything about gravitation. Do not use any equations about gravity! They won't help you, anyway. Use only dimensional analysis. This problem involves estimation, but do not guess. Neatly work out your solution using dimensional analysis. You will be asked to upload your work in the next problem. Newton's Law of Gravitation tells us that any two objects attract each other by pulling each other with a gravitational force. In principle, any two objects far out in space (far from other objects) should attract each other and come together using only their gravitational attraction, but how long would this take? Newton's gravitational constant is G = 6.67 x 10-11 (m2)/(s2 kg) That says G = 6.67 x 1011 (m2)/(s² kg) (Notice that the denominator is "seconds squared" times "kg") Imagine two astronauts far out in space, very far from other objects (the picture above shows the Earth in the…arrow_forwardMany people mistakenly believe that astronauts that orbit the Earth are "above gravity." Calculate the acceleration due to gravity (g) for space shuttle territory, 200 kilometers above the Earth's surface. Earth's mass is 6 x 1024 kilograms and its radius is 6.38 x 106 meters (6380 kilometers). Your answer is what percentage of 9.8m/s2?arrow_forward
- 1. On a planet whose radius is 1.5 × 107 m, the acceleration due to gravity is 20 m/s². An astronaut with a mass of 60 kg is standing on its surface.arrow_forwardUniversal Gravitational 1. The Earth has a mass of 5.972 x 1024 kg and the Moon has a mass of 7.348 x 10²4 kg. The distance between them is 3.844 x 10³ m. What is the force of gravity between the Earth and the Moon? 1.89124097 x 102² N 1.98210479 x 10²² N a. b. C. d. 2.89124097 x 10²2 N 2.98210479 x 102² Narrow_forward32. At a given point above the surface of the Earth, the gravitational acceleration is equal to 5.4 m/s². Take the Earth mass M = 5.97x1024 kg and radius R = 6378 km. The altitude of this point, above the surface of the Earth, in km, is closest to: 33. What does the scale read? (Hint: t = rxF) a. 6900 b. 2800 C. 4200 d. 5700 e. 2200 a. b. C. d. a. b. C. d. e. C. 34. A solid cylinder of 5 cm radius is positioned on a frictionless plane inclined at 30 degrees above horizontal. A force F is exerted by a string wrapped around the spool. When F has a certain critical value the center of mass of spool does not move. When this is the case, what is the angular acceleration of the spool? (Hint: t = la) 0001 1910 a. b. e. 500 N 1000 N 2000 N 4000 N 392 rad/s² 340 rad/s² 260 rad/s² 196 rad/s² 98 rad/s² Scale 30" Massless rod 1000 N 4.05 138 35. Two buckets spin around in a horizontal circle on frictionless bearings. Suddenly, it starts to rain. As result, The buckets speed up because the…arrow_forward
- 6. Newton's Law of Gravitation says that the magnitude F of the force exerted by a body of mass m on a body of mass M is F where G is the gravitational constant and r is the distance between the bodies. (a) Find dF/ dr and explain its mean. What does the minus sign indicate? GmM r2 (b) Suppose it is known that the earth attracts an object with a force that decreases at a rate of 1N/km when r =15,000 km. How fast does this force change when r = 5,000 km?arrow_forward3. Use Newton’s Law of Universal Gravitation to determine the magnitude of the force between the Earthand the Sun.arrow_forwardThe International Space Station orbits Earth at an altitude of 4.03×105 m with a speed of 7.68×103 m/s. The radius of Earth is 6.37×106 m. What is the force of gravity on a 72.1 kg astronaut? Please express your answer in Newtons to 3 significant figures.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
Physics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
Physics for Scientists and Engineers, Technology ...
Physics
ISBN:9781305116399
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Time Dilation - Einstein's Theory Of Relativity Explained!; Author: Science ABC;https://www.youtube.com/watch?v=yuD34tEpRFw;License: Standard YouTube License, CC-BY