A 1000 kg object at 20 m/s hits a 1000 kg object at rest and they stick together. The kinetic energy lost is:

  1. 50,000 J
  2. 2 10^5 J
  3. 1 10^5 J
  4. 3 10^5 J
Answer

C) 1 10^5 J

v = 10 m/s. KE before = 2 10^5 J, after = 1 10^5 J, so 1 10^5 J is converted to heat, sound and deformation. SLO P-11-B-13 · Application

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