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joker joker
wrote...
6 years ago
A 4.2-kg object, initially at rest, explodes into three objects of equal mass. Two of these are determined to have velocities of equal magnitudes (5.0 m/s) with directions that differ by 90. How much kinetic energy was released in the explosion?
 a. 70 J
  b. 53 J
  c. 60 J
  d. 64 J
  e. 35 J
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6 years ago
A
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