A 1 043-kg satellite orbits the Earth at a constant altitude of 110-km. (a) How much energy must be added to the system to move the satellite into a circular orbit with altitude 191 km? How is the total energy of an object in circular orbit related to the potential energy? MJ (b) What is the change in the system's kinetic energy? MJ (c) What is the change in the system's potential energy? MJ

A 1 043-kg satellite orbits the Earth at a constant altitude of 110-km. (a) How much energy must be added to the system to move the satellite into a circular orbit with altitude 191 km? How is the total energy of an object in circular orbit related to the potential energy? MJ (b) What is the change in the system's kinetic energy? MJ (c) What is the change in the system's potential energy? MJ

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Consider a satellite in a circular orbit above Earth’s surface. In Chapter we will learn that the force of gravity changes only the direction of motion of a satellite in circular motion (and keeps it in a circle); it does NOT change the satellite’s speed. Work done on the satellite by the gravitational force is zero. What is your explanation?
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1. You drop a 25 kg mass from rest in from a height of 20 km to the surface of the Earth. You want to know the kinetic energy of the object just before it hits the surface assuming that air friction is negligible (of course this is not true). You decide to use conservation of mechanical energy to determine this. a. Take h = 0 to be the surface of the Earth. Use Ugrav = mgh to determine the potential energy at the initial position and at the final position. What is the change in potential energy and what is the kinetic energy at the end? Write in numerical values in the table. Use 9.8 m/s² for g. U₁ Uf U₁ AU b. Repeat the calculation but let h = 0 be the initial position 20 km above the surface of the Earth. Determine U₁, Uf, AU, and KE, with this new choice. U₁ KEf AU KE C. Does the kinetic energy just before the object hits the Earth depend on where we choose h = 0? Explain why or why not. What quantities are important physically?
While leaning out a window that is 6.4 m above the ground, you drop a 0.60 kg basketball to a friend at ground level. Your friend catches the ball at a height of 1.9 m above the ground. Determine the following. a)the amount of work done (in J) by the force of gravity on the ball. b) the gravitational potential energy (in J) of the ball-earth system, relative to the ground when it is released. c) the gravitational potential energy (in J) of the ball-earth system, relative to the ground when it is caught. d) the ratio of the change (PEf − PE0) in the gravitational potential energy of the ball-earth system to the work done on the ball by the force of gravity
Choose the correct answer A mass m placed at a height h from the ground has a gravitational potential energy PE, (with respect to the ground). If the mass is doubled and the height is halved (m' = 2m and h' = 0.5h) , then the new gravitational potential energy PE, (with respect to the ground) is: Unchanged (x1) Quadrupled (x4) Halved (x0.5) Quartered (x0.25) Doubled (x2)
A 500 kg communication satellite is to be placed in geostationary orbit around the Earth. a)How high does it have to go to have the same period as the Earth? b)What is the gravitational potential energy of the satellite before going into orbit? c)What is the total energy of the satellite in geostationary orbit? d)What is the work that the rocket must do to place the satellite in geostationary orbit?
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