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: Change in linear Momentum(rebound)?

  1. Nov 26, 2007 #1
    [SOLVED] Change in linear Momentum(rebound)?

    A superball with a mass of 84.1 g is dropped from a height of 3.6 m. It rebounds to a height of 2.9 m. The acceleration of gravity is 9.8 m/s^2. What is the change in its linear momentum during the collision with the floor? Answer in units of kg m/s.

    I got no idea how to attack this problem.
  2. jcsd
  3. Nov 26, 2007 #2


    User Avatar
    Science Advisor
    Homework Helper

    The change in linear momentum during collision with the floor is ofcourse the momentum it had just after the bounce minus the momentum it had before it hit the floor.

    Can you find these two momenta from the information given in the problem?
  4. Nov 26, 2007 #3
    Do i need to use free-fall to find the velocity?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook