Find final angular velocity.

  • #26
KE total is = 225J+112.5J

KEf=0 ???
 
  • #28
LOL no. So the KEf is 0 after all? I thought it was 0 because after the collision they both have no kinetic energy because they have no velocity. They both come to a stop. Don't know if my reason is indeed correct.
 
  • #29
gneill
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LOL no. So the KEf is 0 after all? I thought it was 0 because after the collision they both have no kinetic energy because they have no velocity. They both come to a stop. Don't know if my reason is indeed correct.

Of course. No momentum for a single object (the now stuck together disks) means no motion. No motion → no kinetic energy.
 
  • #30
thanks man! :D
 

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