The escape velocity is defined to be the minimum speed with which an object of mass m must move to escape from the gravitational attraction of a much larger body, such as a planet of total mass M. The escape velocity is a function of the distance of the object from the center of the planet R, but unless otherwise specified this distance is taken to be the radius of the planet because it addresses the question "How fast does my rocket have to go to escape from the surface of the planet?" distance from the planet? Follow the usual convention and take the gravitational potential energy to be zero at very large distances. ▸ View Available Hint(s) Exotal = Submit • Part B Consider the motion of an object between a point close to the planet and a point very very far from the planet. Indicate whether the following statements are true or false. O true O false Submit IVE ΑΣΦ | Angular momentum about the center of the planet is conserved. ▾ Part C O true O false C Request Answer Total mechanical energy is conserved. ?

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Chapter7: Gravity
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The escape velocity is defined to be the minimum speed with which an object of mass m must
move to escape from the gravitational attraction of a much larger body, such as a planet of total
mass M. The escape velocity is a function of the distance of the object from the center of the
planet R, but unless otherwise specified this distance is taken to be the radius of the planet
because it addresses the question "How fast does my rocket have to go to escape from the
surface of the planet?"
The key to making a concise mathematical definition of escape velocity is to consider the energy. If an object is launched at its escape velocity, what is the total mechanical energy Etotal of the object at a very large (i.e., infinite)
distance from the planet? Follow the usual convention and take the gravitational potential energy to be zero at very large distances.
► View Available Hint(s)
Etotal =
Submit
Part B
Consider the motion of an object between a point close to the planet and a point very very far from the planet. Indicate whether the following statements are true or false.
O true
Angular momentum about the center of the planet is conserved.
O false
Submit
ΜΠΙ ΑΣΦ
Part C
O true
O false
?
Request Answer
Total mechanical energy is conserved.
Transcribed Image Text:The escape velocity is defined to be the minimum speed with which an object of mass m must move to escape from the gravitational attraction of a much larger body, such as a planet of total mass M. The escape velocity is a function of the distance of the object from the center of the planet R, but unless otherwise specified this distance is taken to be the radius of the planet because it addresses the question "How fast does my rocket have to go to escape from the surface of the planet?" The key to making a concise mathematical definition of escape velocity is to consider the energy. If an object is launched at its escape velocity, what is the total mechanical energy Etotal of the object at a very large (i.e., infinite) distance from the planet? Follow the usual convention and take the gravitational potential energy to be zero at very large distances. ► View Available Hint(s) Etotal = Submit Part B Consider the motion of an object between a point close to the planet and a point very very far from the planet. Indicate whether the following statements are true or false. O true Angular momentum about the center of the planet is conserved. O false Submit ΜΠΙ ΑΣΦ Part C O true O false ? Request Answer Total mechanical energy is conserved.
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