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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 101 times)

Sufayan.ah

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on: Jul 29, 2018
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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Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: A

Answer to Question 2

Answer: D


Sufayan.ah

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Reply #2 on: Jul 29, 2018
Thank you!


popopong

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Reply #3 on: Jul 29, 2018
Always glad to help...


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