astronomy/physics

Use Newton’s Law of Gravity to calculate the force of gravity between a 39 kg person and Earth.

  1. 👍 0
  2. 👎 0
  3. 👁 93
asked by silvia
  1. F = M g, where g = 9.8 m/s^2,
    or, if you really must use that Newton law,

    F =G*Me*M/Re^2

    M = 39 kg
    G = universal gravity constant
    Re = Earth radius
    Me = Earth mass

    You will have to look up the last three quantities. I have not memorized them.

    The answers should agree

    1. 👍 0
    2. 👎 0
    posted by drwls
  2. Consider a pulse of laser light aimed at the moon that bounces back to earth. The distance between Earth and Moon is 3.8 x 10 (small eight above ) m. Show that the round-trip time for the light is 2.5 s.

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    Proponents of astrology claim that the positions of the planets at the time of a baby's birth will affect the life of that person in important ways. Some assert that this effect is due to gravity. Examine this claim with Newton's

    asked by cb on March 14, 2009
  2. Physics

    In mathematical language, Newton's Law of Gravity expresses the force of gravity, F, between two objects in the following way: F= (GMm)/r^2 where M is the mass of one object, m is the mass of the other object, r is the distance

    asked by Adam on September 22, 2011
  3. physics

    Proponents of astrology claim that the positions of the planets at the time of a baby's birth will affect the life of that person in important ways. Some assert that this effect is due to gravity. Examine this claim with Newton's

    asked by cb on March 15, 2009
  4. science

    Which statement best describes Newton’s Law of Universal Gravitation? A.Large objects, like Earth and the Sun, attract other objects everywhere in the universe. B.Gravity is a kind of magnetic force between objects and Earth.

    asked by victoria on February 17, 2014
  5. Physics

    Calculate the percentage of Earth’s gravitational force on the ISS astronauts while orbiting at an altitude of 248 miles above Earth’s surface. To do this, compare the gravitational force on an orbiting astronaut to the force

    asked by Haley on January 28, 2014
  6. 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? Check all that apply. A: The

    asked by Xx_Ashley_xX on January 28, 2015
  7. physics

    The relationship between magnetic force and magnetic pole strength is similar to the relationship between which of the following?. A) force, mass, and distance as in Newton's law of gravity.B) All of these.C) current, voltage, and

    asked by Christy on April 16, 2012
  8. physics

    The relationship between magnetic force and magnetic pole strength is similar to the relationship between which of the following?. A) force, mass, and distance as in Newton's law of gravity.B) All of these.C) current, voltage, and

    asked by Christy on April 14, 2012
  9. physics

    Proponents of astrology claim that the positions of the planets at the time of a baby's birth will affect the life of that person in important ways. Some assert that this effect is due to gravity. Examine this claim with Newton's

    asked by cb on March 15, 2009
  10. Science

    Can someone please check my answers and if they are wrong can you help me fix them? Thank so much!! 1. Which of the following determines the strength of the force of gravity between two objects? Check all that apply. (2 points)

    asked by Melissa on January 24, 2014

More Similar Questions