Post a New Question


posted by .

Starting from Newton’s law of universal gravitation, show how to find the speed of the moon in its orbit from the earth-moon distance of 3.9 × 108 m and the earth’s mass. Assume the orbit is a circle.

  • Physics -

    Let V be the velocity. Assume the earth's velocity is much larger and that the moon goes around the Earth at the center. Actually, both revolve about the center of mass of the pair, at a speed that depends upon the sum of the masses.

    Let M be the Earth's mass.
    R = 3.9*10^8 m
    G = universal constant of gravity

    GM/R^2 = V^2/R

    Solve for V

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

More Related Questions

Post a New Question