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Author Question: Jacques and George meet in the middle of a lake while paddling in their canoes. They come to a ... (Read 58 times)

wrbasek0

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on: Jul 29, 2018
Jacques and George meet in the middle of a lake while paddling in their canoes. They come to a complete stop and talk for a while. When they are ready to leave, Jacques pushes George's canoe with a force to separate the two canoes.
 
  What is correct to say about the final momentum and kinetic energy of the system if we can neglect any resistance due to the water?
  A) The final momentum is in the direction of but the final kinetic energy is zero.
  B) The final momentum is in the direction opposite of but the final kinetic energy is zero.
  C) The final momentum is in the direction of and the final kinetic energy is positive.
  D) The final momentum is zero and the final kinetic energy is zero.
  E) The final momentum is zero but the final kinetic energy is positive.

Question 2

A 2.50-kg stone is dropped from rest at a height of 3.75 m. What impulse does gravity impart to this stone from the instant it is dropped until it hits the ground, assuming negligible air resistance?
 
  What will be an ideal response?


mfedorka

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

Answer: B

Answer to Question 2

Answer: 21.4 N  s


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