1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Escape velocity

  1. Jun 18, 2015 #1
    If an object is thrown upwards with escape velocity, will it orbit the earth?
     
  2. jcsd
  3. Jun 18, 2015 #2

    Vanadium 50

    User Avatar
    Staff Emeritus
    Science Advisor
    Education Advisor

    Think about it - If an object is thrown downwards with escape velocity, will it orbit the earth?
     
  4. Jun 18, 2015 #3

    russ_watters

    User Avatar

    Staff: Mentor

    What does the word "escape" mean? Does that definition match the definition of "orbit"?
     
  5. Jun 18, 2015 #4

    Vanadium 50

    User Avatar
    Staff Emeritus
    Science Advisor
    Education Advisor

    So now you have two questions, approaching the problem from two different directions, These are hints. What do you think the answer is?
     
  6. Jun 18, 2015 #5
    escape velocity is the velocity by which any object overcomes the gravitational pull and flies away from planet.
    ve = √2gr
     
  7. Jun 18, 2015 #6
    Will a body projected with a speed less than the escape velocity may orbit the earth in circular path?
     
  8. Jun 18, 2015 #7
    Of course. All elliptic paths are closed orbits, so all speeds less than escape can take any elliptic path (of which the circular is special case)
     
  9. Jun 18, 2015 #8

    jbriggs444

    User Avatar
    Science Advisor

    For a body launched from the surface of the earth the only possibility for a circular orbit is a horizontal launch with a speed equal to escape velocity divided by the square root of two. Any other direction and the orbit will intersect with the surface of the Earth. Any higher velocity and the orbit will fail to be circular. It will rise above the surface of the earth. Any lower velocity and the orbit will fail to be circular. It will fall below the surface of the earth.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Escape velocity
  1. 'escape' velocity (Replies: 15)

  2. Escape Velocity (Replies: 4)

  3. Escape velocity (Replies: 5)

  4. Escape Velocity (Replies: 1)

  5. Escape velocity (Replies: 4)

Loading...