1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    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!

Accelerated Linear Motion

  1. Sep 15, 2003 #1
    If anybody could offer any help with this id be eternally gratefull

    Two cars A and B, each 5m in length, travel with constant velocity 20 m/s along a straight level road. The front of car A is 15m directly behind the rear of car B. Immediately on reaching a point P, each car decelerates at 4m/s^2.
    1) Show that A collides with B
    2) At what distance from P does the collision occur?
    3) Show the motion of both cars on the same speed-time graph.

    Thanks in advance
  2. jcsd
  3. Sep 15, 2003 #2


    User Avatar
    Science Advisor

    The cars will collide at the point where they stop (B stops first and A stops at the same point). I'll leave the rest as an exercise in elementary calculus.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook