72. (a) Conservation of linear momentum implies mvAABBA AB BGGGG+=+''.SincemA= mB= m= 2.0 kg, the masses divide out and we obtain ˆˆˆˆˆˆ(15i 30j) m/s ( 10i 5j) m/s ( 5i20 j) m/s(10i 15 j) m/s .BABAvvvv′′=+−=++−+−−+=+GGGG(b) The final and initial kinetic energies are KmvmvvfABiAB=+=−+++=×++−+=×12121220
This is the end of the preview. Sign up
access the rest of the document.
This note was uploaded on 05/17/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.