A 2 kg trolley at 3 m/s couples with a 1 kg trolley at rest. The fraction of kinetic energy kept is:

  1. 13
  2. 1
  3. 12
  4. 23
Answer

D) 23

v = 2 m/s; KE: 9 J to 6 J, i.e. 23. SLO P-11-B-13 · Application

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