Ask questions and get helpful answers.

A rocket of mass,m is located at an alttitude h meters above the surface of a planet of a mass,M and radius, R.

*write an expression for the gravitational pull on it.
*Deduce an expression for the gravitational potential and escape velocity at that location.

  1. 👍
  2. 👎
  3. 👁
  4. ℹ️
  5. 🚩

1 answer

  1. F = G m M/r^2 = G m M/(R+h)^2
    potential = - G m M /(R+h)
    (1/2) m v^2 = G m M/(R+h)
    so
    v^2 = 2 G M/(R+h)

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩

Answer this Question

Related Questions

Still need help?

You can ask a new question or browse existing questions.