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mbhound mbhound
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4 years ago
As an object moves from point A to point B only two forces act on it: one force is conservative and does -70 J of work, the other force is nonconservative and does +50 J of work. Between A and B,
 a. the kinetic energy of object increases, mechanical energy increases.
  b. the kinetic energy of object decreases, mechanical energy increases.
  c. the kinetic energy of object decreases, mechanical energy decreases.
  d. the kinetic energy of object increases, mechanical energy decreases.
  e. None of the above.
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juliaguayjuliaguay
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4 years ago Edited: 10 months ago, bio_man
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B is the correct answer.

work done by non conservative force is 50 J and conservative force work is -70J

resulstant is -20J

kintetic energy decreases and total energy increases

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