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!

Instantaneous velocity and friction

  1. Mar 21, 2004 #1
    We need to know the instentaneous velocity formula for a car launched down a hallway. we also need to figure out how to calculate all the friction involved in this. please help.
  2. jcsd
  3. Mar 21, 2004 #2
    The car's velocity at a certain moment [tex]t[/tex] is:
    [tex]\vec V(t) = \vec V_0 + \vec at[/tex]
    The car's acceleration is defined as:
    [tex]\vec a = \frac{\vec \Sigma F}{m}[/tex]
    In this case the only force on the motion axis (X) is the friction:
    [tex]\vec a = \frac{\vec f_k}{m} = \frac{-N\mu }{m} = \frac{-mg\mu }{m} = g\mu[/tex]

    Therefore the car's velocity is:
    [tex]\vec V(t) = \vec V_0 - g\mu t[/tex]

    Does this answer your question?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Instantaneous velocity and friction
  1. Instantaneous Velocity (Replies: 2)

  2. Instantaneous Velocity (Replies: 1)

  3. Instantaneous velocity (Replies: 16)

  4. Instantaneous Velocity (Replies: 2)