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!

Impulse problem

  1. Apr 28, 2008 #1
    1. The problem statement, all variables and given/known data
    A ball of mass .110 kg is dropped from rest from a height of 1.25 m. It rebounds from the floor to reach a height of .800 m. What impulse was given to the ball by the floor?

    2. Relevant equations


    3. The attempt at a solution

    Could someone please tell me if this is the correct formula?

    Thank you very much
  2. jcsd
  3. Apr 28, 2008 #2
    Hi chocolatelover! Both of your equations look right but need some minor tweaking.

    For starters (I have no clue why, but...) the symbol for impulse is a capitol J.

    So J = Δp for instance.

    Your first equation should be extended a bit more.

    J = ΣFΔt would give you an approximation for impulse however if you wanted the exact value of J you would need to make Δt -> 0, and sum up an infinite number tiny bits force.

    A more concrete definition would be [tex]J = \int_{t_i}^{t_f}{F dt}[/tex]
  4. Apr 28, 2008 #3
    Thank you very much

    Does this look right?
    integral from 1.25 to .800 (.110kg)(9.8m/s^2)dt


    Thank you very much
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Impulse problem
  1. Impulse problem (Replies: 6)

  2. Impulse problem (Replies: 1)

  3. Impulse problem (Replies: 2)

  4. Impulse Problem (Replies: 6)

  5. Impulse Problem (Replies: 1)