1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Find its speed.

  1. Sep 18, 2009 #1
    1. The problem statement, all variables and given/known data

    The earth travels around the sun in a circle of radius 150 million km and does a complete cycle in about 365 days. Find its speed.



    2. Relevant equations

    v= d/t



    3. The attempt at a solution

    d = 1000m/1km x 150,000,000km = 1.5 x 10^11m
    There are 31,536,000 seconds in 1year.
    v = 1.5 x 10^11/31,536,000 = 4.7 x 10^18 they say this is wrong answer and the right answer is actually 29 800 m/s.
    Please help? Thank you.
     
  2. jcsd
  3. Sep 18, 2009 #2
    Find the circumference of Earth's orbit. You used the radius.
     
    Last edited: Sep 18, 2009
  4. Sep 18, 2009 #3
    d = circumfrence = 2piR= 2 * 3.1415 * 150 * 10^6km
    t = 365 day.
    s = d(in meters) / t(in seconds)
     
  5. Sep 18, 2009 #4
    it's been solved...i calculated circumferance and it worked out to be the right answer. thank you!
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Find its speed.
  1. Finding speed (Replies: 5)

  2. Find the Speed (Replies: 1)

Loading...