A 1 kg object at 10 m/s hits a 1 kg object at rest and they stick together. The kinetic energy lost is:

  1. 26 J
  2. 25 J
  3. 12.5 J
  4. 50 J
Answer

B) 25 J

v = 5 m/s. KE before = 50 J, after = 25 J, so 25 J is converted to heat, sound and deformation. SLO P-11-B-13 · Application

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