University Physics Volume 1
18th Edition
ISBN: 9781938168277
Author: William Moebs, Samuel J. Ling, Jeff Sanny
Publisher: OpenStax - Rice University
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Textbook Question
Chapter 13, Problem 65AP
A body of mass 100 kg is weighed at the North Pole and at the equator with a spring scale. What is the scale reading at these two points? Assume that
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a)find the magnitude of the gravitational force (in N) between a planet with mass 9.00 ✕ 1024 kg and its moon, with mass 2.20 ✕ 1022 kg, if the average distance between their centers is 2.20 ✕ 108 m.
= N
b)What is the moon's acceleration (in m/s2) toward the planet? (Enter the magnitude.)
What is the planet's acceleration (in m/s2) toward the moon? (Enter the magnitude.)
A 1000 kg rocket is drifting in space and it will crash into the surface of a Venus. What is the gravitational force pulling the rocket into Venus when the rocket is 10^9 km away from Venus? Assume the mass of earth is 6 × 10^24 kg.
A person standing at the North Pole has no acceleration due to the Earth’s rotation. This means that if they move to the equator, they will actually weigh a little bit less standing on a scale then when they were at the North Pole. In both cases, the scale reads the normal force acting on the person standing on it. How many lbs less would a 180lb man weigh at the equator compared to the North pole? There are 4.45N in 1.0lb.
Chapter 13 Solutions
University Physics Volume 1
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- For this problem, assume that the earth is a perfect sphere. Also, assume that if your mass is m, then the earth exerts a gravitational force on you of magnitude mg, where g = 9.8 m/s2 at all points of the earth's surface. a) Your mass is m = will the scale read? (Thanks to the Third Law, this is the same as asking for the normal force exerted on you by the scale.) b) Next you go to the Equator and stand on a scale. What does it read? The radius of the earth is 6.4 × 106 m. c) Suppose the earth were rotating so quickly that objects became “weightless" at the equator. How long would the day be? 50 kg. If you are standing on a scale at the North Pole, whatarrow_forwarda) Find the magnitude of the gravitational force (in N) between a planet with mass 7.00 ✕ 1024 kg and its moon, with mass 2.20 ✕ 1022 kg, if the average distance between their centers is 2.20 ✕ 108 m. ?N (b) What is the moon's acceleration (in m/s2) toward the planet? (Enter the magnitude.) ?m/s2 (c) What is the planet's acceleration (in m/s2) toward the moon? (Enter the magnitude.) ?m/s2arrow_forwardA 1000 kg rocket is drifting in space and it will crash into the surface of Venus. What is the gravitational force pulling the rocket into Venus when the rocket is 10^9km away from Venus? Assume the mass of the earth is 6 ×10^24 kg.arrow_forward
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