physics question

As denizens of the surface of a spinning planet, we are always in uniform circular motion. Imagine you are in Nairobi (on the Earth's equator) at noon on a Monday. Answer the following questions only considering the rotation of the earth and NOT the Earth's circular motion around the sun. The radius of the earth is 6371 km. A day is 24 hours.

Assuming that you are at at theta = 0 rad at noon on Monday and moving in the positive direction, what is your position theta in rad on Tuesday at 11:00 am?

I'm assuming this has something to do with orbit and rotation, but what exactly should I be using?

  1. 👍 0
  2. 👎 0
  3. 👁 546
  1. Monday at noon to Tuesday at 11 am is 23 hours.
    At Noon in Nairobi the sun is overhead on the equator (assuming on a solstice day when the sun is over the equator)
    The sun stays there, but I move east with the earth rotation and 23 hours later I have gone 23/24 of the way around
    (23/24)360 = 345 degrees
    In another hour or 15 degrees it will be overhead again.

    1. 👍 0
    2. 👎 0
  2. I mean an equinox, not solstice day, March or September

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. physic

    Planet A and planet B are in circular orbits around a distant star. Planet A is 4.5 times farther from the star than is planet B. What is the ratio of their speeds vA/vB?

    asked by ozer on July 13, 2013
  2. PHYSICS PLEASE HELP

    A satellite has a mass of 5850 kg and is in a circular orbit 4.50 x 10^5 m above the surface of a planet. The period of the orbit is two hours. The radius of the planet is 4.20 x 10^6 m. What is the true weight of the satellite

    asked by Anonymous on October 28, 2010
  3. Colle physics

    For an object in uniform circular motion, on what parameters does the experimental determination of the centripetal force depend when using F = ma

    asked by Tessa on October 28, 2014
  4. Physics

    Calculate the work done by planet X on its moon. Planet X applies a force of 5.6 x 10^10 N on its moon and the moon is 4.0 x 10^8 km away from the planet and it continues to circle the planet in a circular orbit of circumference

    asked by Marty on March 26, 2008
  5. Physics

    The gravitational potential difference between the surface of a planet and a point P, 10 m above the surface, is 8.0 J kg-1. Assuming a uniform field, what is the value of the gravitational field strength in the region between the

    asked by Christine on January 19, 2011
  1. Physics

    Update: Planets are not uniform inside. Normally, they are densest at the center and have decreasing density outward toward the surface. Model a spherically symmetric planet, with the same radius as the earth, as having a density

    asked by Katie on April 30, 2015
  2. Astronomy

    Retrograde motion describe the A backward motion of the stars relative to Earth B uniform circular motion exhibited by the planets C irregular speeds at which the planet travel. D backward motion of the planets with respect to the

    asked by B on March 28, 2010
  3. Physics

    A charged particle is projected into a uniform B-field. Its velocity vector is perpendicular to the B-field vector. What type of path will the particle travel? Neglect gravity. Answer straight line motion elliptical motion

    asked by tom on July 16, 2013
  4. physics

    On planet Tehar, the acceleration of gravity is the same as that on Earth but there is also a strong downward electric field with the field being uniform close to the planet's surface. A 2.16 kg ball having a charge of 4.80 uC is

    asked by VJC on September 8, 2010
  5. physics

    For this problem use the Uniform circular motion mode of the simulation. (a) Given the limits on the sliders in the simulation, what is the maximum possible speed that can be achieved in "Uniform circular motion" mode? .25 m/s For

    asked by jesse on December 20, 2009

You can view more similar questions or ask a new question.