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Two 1.9 kg balls are attached to the ends of a thin rod of negligible mass,...

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Physics

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?

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