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: Simple question about velocity/acceleration

  1. Jul 20, 2010 #1
    Can an object be moving when its acceleration is zero?
    -it can for any length in time, correct?

    And can an object be accelerating when its velocity is zero?
    -it can, but only for one moment in time, correct?
     
  2. jcsd
  3. Jul 20, 2010 #2

    PhanthomJay

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Yes and Yes.
     
  4. Jul 20, 2010 #3
    Jay can you look at my two other my recent post about ball acceleration/velocity and velocity of a ball please?
     
  5. Jul 21, 2010 #4
    for 1st question certainly yes..any thing consisting constant velocity has 0 acceleration..

    And for second ques...well....i think its not possible
     
  6. Jul 21, 2010 #5
    I think the 3st question and the second are correct
    the first one when an object moving with constant velocity so it's acceleration is 0
    the second question occurs in many cases for example when an object moving in the +ve x direction and its acceleration is negative so that means it is decelerating at a moment when he object changes direction the velocity will be zero and the acceleration will still constant

    best regards :)
     
  7. Jul 21, 2010 #6
    the second question occurs in
    many cases for example when
    an object moving in the +ve x
    direction and its acceleration is
    negative so that means it is
    decelerating at a moment when
    he object changes direction the
    velocity will be zero and the
    acceleration will still constant
    best regards :)
    how can a decelerating object have a constant acc?
     
  8. Jul 21, 2010 #7
    when it's initial velocity is positive and its acceleration is negative or vies versa.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook