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: Acceleration question

  1. Oct 9, 2015 #1
    1. The problem statement, all variables and given/known data
    Which one of these motions is at constant acceleration?
    A) A car moving at a constant speed and constant direction.
    B) A train making stops along its route.
    C) A moon orbiting a planet.

    2. Relevant equations

    3. The attempt at a solution
    I believe that A is an acceptable answer, since the car is at a constant acceleration of zero.
    My teacher says C is the only correct answer.

    Thank you for your input!
  2. jcsd
  3. Oct 9, 2015 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

    Your teacher needs to go back to school.
  4. Oct 9, 2015 #3

    rude man

    User Avatar
    Homework Helper
    Gold Member

    I agree. The teacher seems to be entertaining the notion that the orbit of the moon is a perfect circle, which it ain't.
  5. Oct 10, 2015 #4
    How the teacher can select C? Have you asked what is the reason?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted