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Author Question: A sandbag is motionless in outer space. A second sandbag with 3 times the mass moving at 12 m/s ... (Read 82 times)

khang

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on: Jul 29, 2018
A sandbag is motionless in outer space. A second sandbag with 3 times the mass moving at 12 m/s collides with it and they both stick together and move at a speed of
 
  A) 3 m/s.
  B) 4 m/s.
  C) 6 m/s.
  D) 8 m/s.
  E) none of the above

Question 2

A rock is thrown upward with a speed of 15 m/s on the surface of planet X where the acceleration of objects in free fall is 2.5 m/s2 and there is no atmosphere. How long does it take for the rock to return to where it was thrown?
 
  A) 6.0 s
  B) 8.0 s
  C) 10 s
  D) 12 s


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CharlieArnold

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

Answer: E

Answer to Question 2

D


khang

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Reply 2 on: Jul 29, 2018
Gracias!

Bigfoot1984

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Reply 3 on: Yesterday
Excellent

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