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!

Momentum and vector help

  1. Oct 17, 2004 #1
    i know that the formula for impulse is f(delta)t. my question ask " a truck with a mass of 1.20 x 10^3 kg has its brakes applied for 5.50s as it slows down from 24.0m/s, west to 10.4m/s west. determine the magnitude and direction of the impulse provided by the brakes." i know you need to use the formula
    f(delta)t = m(delta)(vf-vi). but since i want the impulse do i just fill in the right side of the formula and git impulse or do i use the time also. thanks.
  2. jcsd
  3. Oct 17, 2004 #2
    u can safely ignore "time=5.50s" as impulse is independant of time.

    just impulse= (1.20 x 10^3)(24.0-10.4)
  4. Oct 17, 2004 #3


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    The impulse is the left-hand-side: (Favg)(Delta t).
    By the impulse-momentum theorem, it then follows that it is equal to the change-in-momentum.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Momentum and vector help
  1. Momentum and Vectors (Replies: 1)

  2. Momentums as vectors (Replies: 2)

  3. Momentum Help (Replies: 10)