http://www.grc.nasa.gov/WWW/K-12/airplane/conmo.html Some evidence http://www.grc.nasa.gov/WWW/K-12/airplane/conmo.html http://www.grc.nasa.gov/WWW/K-12/airplane/conmo.html http://www.grc.nasa.gov/WWW/K-12/airplane/conmo.html Conservation of Momentum Conservation of Momentum Some evidence Some evidence http://www.grc.nasa.gov/WWW/K-12/airplane/conmo.html conservation of momentum conservation of momentum http://www.grc.nasa.gov/WWW/K-12/airplane/conmo.html