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!

I need some help with some basic material

  1. Oct 1, 2004 #1
    I can't seem to figure these problems if anyone can give me the concept and start me off that would be great.

    Thanks in advance

    Problem one: A car is traveling at a constant speed of 27 m/s on a highway. At the instant this car passes an entrance ramp, a second car enters the highway from the ramp. The second car starts from rest and has a constant acceleration. What acceleration must it maintain so that the two cars meet for the first time at the next exit which is 1.8 km away?

    Problem two: A bus stop to pick up riders. A woman is running at a constant velocity of +5.0 m/s in an attempt to catch the bus When she is 11 m from the bus, it pulls away with a constant acceleration of +1.0 m/s^2. From this point, how much time does it take her to reach the bus if she keeps running with the same velocity?

    Oh sorry i posted this after i read the before you post thread Once again Im sorry for posting Homework help here
    Last edited: Oct 1, 2004
  2. jcsd
  3. Oct 1, 2004 #2


    User Avatar
    Homework Helper

    For the first problem consider the formulas

    [tex] vt = x [/tex]

    [tex] \frac{1}{2}at^2 = x [/tex]

    You go the speed for the car and the distance x they will both travel, what can you do with that?

    For the second problem

    She will do

    [tex] vt = x + 11 [/tex]

    while the bus will do

    [tex] \frac{1}{2}at^2 = x [/tex]
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: I need some help with some basic material
  1. I Need Some Help . (Replies: 1)

  2. I need some help! (Replies: 3)

  3. I need some help (Replies: 1)