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Author Question: A ball is projected into the air with 900 J of kinetic energy that is transformed to potential ... (Read 90 times)

Sufayan.ah

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A ball is projected into the air with 900 J of kinetic energy that is transformed to potential energy at the top of its trajectory. When it returns to its original level after encountering air resistance, its kinetic energy is
 
  A) less than 900 J.
  B) more than 900 J.
  C) 900 J.
  D) not enough information

Question 2

A car moves 4 times as fast as another identical car. Compared with the slower car, the faster car has
 
  A) 4 times the kinetic energy.
  B) 8 times the kinetic energy.
  C) 12 times the kinetic energy.
  D) 16 times the kinetic energy.



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popopong

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Answer to Question 1

Answer: A

Answer to Question 2

Answer: D




popopong

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