1. Limited time only! Sign up for a free 30min personal 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!

Homework Help: Find the radius of a particle's circular path

  1. Jun 9, 2017 #1
    1. The problem statement, all variables and given/known data
    A particle moves along a circular path over a horizontal xy plane at a constant speed. At time t1= 3.00s, its acceleration vector is given by (3i-5j) m/s^2. At time t2=7.00 s, its acceleration is given by (-3i+5j) m/s^2.
    Find the radius of the particle's circular path.

    2. Relevant equations
    centripetal acceleration = v^2/r

    3. The attempt at a solution
    Stumbling around for about an hour with no clue what to do... left me with nothing to show for.
  2. jcsd
  3. Jun 9, 2017 #2


    User Avatar
    Science Advisor
    Homework Helper
    2017 Award

    Hello David, :welcome:

    Doesn't count as an attempt at solution; according to the PF rules we're not allowed to assist in such a case.

    But for a first post I'll stick out my neck :rolleyes:: You have two acceleration vectors; notice anything particular about them ? Could that help you towards another expression involving ##v## and ##r## ?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted