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!

Help Relative Velocity

  1. Oct 4, 2016 #1
    1. The problem statement, all variables and given/known data
    A person on a train watches a car approaching a railway crossing ahead on his track. It appears that the car’s driver has fallen asleep and will not slow down. The train is traveling north‐east at 100km/h while the car is going west at 80km/h. The train is 4 km and the car is 3km from the crossing. I) What is the velocity of the car relative to the train. Pick the train travel direction (North‐ East) as the +x direction and the perpendicular direction (North‐west) as the +y direction II) Where will the train be when the car gets to the crossing, will they collide? III) Find the acceleration of the car required to cause a collision. IV) In the reference frame of the train rider, what is the acceleration.

    2. Relevant equations


    3. The attempt at a solution
     
  2. jcsd
  3. Oct 4, 2016 #2

    BvU

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Hi kid, :welcome:

    Is there a question here ? PF has a specific culture (read the guidelines) asking something from you ...
     
  4. Oct 4, 2016 #3
    could u solve it
     
  5. Oct 4, 2016 #4

    PeroK

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    In order to get help you need to show your best attempt to solve the problem and explain where you get stuck. We can just do the problem for you.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Help Relative Velocity
Loading...