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: Two Part Motion

  1. Sep 24, 2006 #1
    I have a question which reads as follows:
    After a long time apart, a young couple in love are running towards each other in the hallways of an airport. They are 30.0m apart. The husband is accelerating from rest at a rate of 0.7m/s2 (2 is squared), and the wife was moving at 3.4m/s and maintains her speed. How much time passes before they are finally together?

    I just need help gathering the info from the question.
    What I have so far:
    Husband
    -v1=0m/s
    -acceleration=0.7m/s2 (2 is squared)
    -distance=30.0m
    -time=?

    Wife
    -v1=3.4m/s
    -distance=30.0m
    -t=?

    Thanks in advance:)
     
  2. jcsd
  3. Sep 25, 2006 #2

    Astronuc

    User Avatar
    Staff Emeritus
    Science Advisor

    One may infer from the problem that the husband starts accelerating when his wife is 30 m from him. During the same period of time, each is traveling to some common point.

    Let x be the distance traveled by the wife, and then knowing the velocity that the wife travels, 3.4 m/s, the distance as a function of time is simply x = 3.4 t (t in seconds).

    In the same time, when they meet, the husband must have traveled 30-x.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook