While in an airplane flying at 100 km/h you look down from the ...

[Bernana]

While in an airplane flying at 100 km/h you look down from the window and spot another airplane flying at the same speed in the opposite direction. Relative to you, the speed of the spotted plane is
 
  A) zero.
  B) 100 km/h.
  C) 150 km/h.
  D) 200 km/h.

Question 2

A mass is attached to a vertical spring and bobs up and down between points A and B. Where is the mass located when its kinetic energy is a minimum?
 
  A) at either A or B
  B) midway between A and B
  C) one-third of the way between A and B
  D) one-fourth of the way between A and B
  E) none of the above

[amandalm]

Answer to Question 1

Answer: D

Answer to Question 2

A

[Bernana]

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[amandalm]

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