1. Limited time only! Sign up for a free 30min personal 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!

Homework Help: Please help algebra-based acceleration of gravity

  1. Oct 15, 2009 #1
    1. The problem statement, all variables and given/known data
    A ball with a mass of 2kg is trown off a cliff 30m high and hits the ground with a momentum of 110 kg*m/s^2. What is the acceleration of gravity pulling on the ball?

    2. Relevant equations
    F=ma and I'm not sure what else.

    3. The attempt at a solution
    I probably messed up.
  2. jcsd
  3. Oct 16, 2009 #2


    User Avatar

    Momentum is not equal to force
    p=mv, use this equation to solve it
    where p(momentum) is N·s
  4. Oct 16, 2009 #3
    You don't need F=ma.

    As Suy said, use p=mv. That'll give you velocity; then just use your basic kinematics equations to find a.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook