Two 1.9 kg balls are attached to the ends of a thin rod ofnegligible mass, 62 cm in length. The rod is free to rotate in avertical plane about a horizontal axis through its center. With therod initially horizontal as shown, a 0.42 kg wad of wet putty dropsonto one of the balls with a speed of 3.2 m/sec and sticks toit.
1)
What is the ratio of the magnitude of angular momentum of theentire system just after the collision to just before thecollision?(|L|after/|L|before)
2)
What is the angular speed of the system just after the putty wadhits?
rad/sec
3)
What is the ratio of the kinetic energy of the entire systemjust after the collision to just before the collision?(KEafter/KEbefore)
4)
Through what angle will the system rotate until it momentarilystops?
