Physics

posted by Calitryphosa

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.

  1. drwls

    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

Your Answer

Similar Questions

  1. physics

    Given that the distancef rom Earth to the Moon is 3.8 x 10^8 m, that the Moon takes 27 days to orbit Earth, and that the mass of the Moon is 7.4 x 10^22 kg, what is the acceleration of the Moon and the size of the attractive force …
  2. Physics - Newton's Law of universal gravitation

    Describe how Newton used each of the following phenomena to support the law of universal gravitation a) the orbit of the moon b) kepler's third law
  3. Physics

    A. Use the relation 2 m m m GM g R ƒ­ to find the acceleration due to gravity on the surface of the Moon. You can use the following data: Mass of the Moon m M = 7.35 ¡Ñ 1022 kg. Radius of the Moon m R = 1.74 ¡Ñ 106 m. B. How …
  4. physics

    The physics of energy and Earth's moon as a satellite. The moon is an Earth satellite of mass 7.35 x 10^22 kg, whose average distance from the centre of Earth is 3.85 x 10^8 m. a) What is the gravitational potential energy of the moon …
  5. Physics

    Whenever two Apollo astronauts were on the surface of the Moon, a third astronaut orbited the Moon. Assume the orbit to be circular and 160 km above the surface of the Moon, where the acceleration due to gravity is 1.42 m/s2. The radius …
  6. Physics Classical Mechanics

    A planet has a single moon that is solely influenced by the gravitational interaction between the two bodies. We will assume that the moon is moving in a circular orbit around the planet and that the moon travels with a constant speed …
  7. Science check answer quick!

    I really do not understand Number 7 Which of these does Newton's law of universal gravitation imply?
  8. Science

    Can someone please check my answers and if they are wrong can you help me fix them?
  9. Physics

    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. So I calculated this and …
  10. Science

    I would really appreciate it if someone checked my answers and told me if they were right. Thx. ~Ashley 1. Which of the following determines the strength of the force of gravity between two objects?

More Similar Questions