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!

Please anyone help me dynamic quiz i need it for a test

  1. Nov 5, 2007 #1
    [​IMG]

    need help on question 3 and 4

    I don't understand what to do for those question can anyone show me an message below
     
  2. jcsd
  3. Nov 5, 2007 #2

    Astronuc

    User Avatar

    Staff: Mentor

    In problem 3, one has a distance of 40 m in which to react then decelerate to a stop.

    One knows the initial velocity 72 km/h (and one should convert to m/s) and a time of 0.6 s, during which some distance is traveled, dreaction. The distance over which the car must decelerate is 40 m - dreaction = dstopping

    One has to determine if the required deceleration exceeds the acceleration (or deceleration) associated with force of friction.

    Reference for equations of motion
    http://hyperphysics.phy-astr.gsu.edu/hbase/mot.html

    For the pulley problem (or equivalent) -
    http://hyperphysics.phy-astr.gsu.edu/hbase/hpul.html#c1

    General problems for Newton's 2nd law -
    http://hyperphysics.phy-astr.gsu.edu/hbase/N2st
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Please anyone help me dynamic quiz i need it for a test
  1. Please help me anyone (Replies: 0)

Loading...