The x-component of motion of an object is given by x(t) = ...

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The x-component of motion of an object is given by x(t) = Axcos(xt + x) and the y-component of motion of the object is given by y(t) = Aycos(yt + y).
 
  What relationships between the A,, and  parameters must be true so that the motion of the object is on a circle? A)
 
  Ax = Ay, x = y, and x = y
  B)
 
  Ax = Ay, x = y
  C)
 
  Ax = Ay, x = y, and x = y  /2
  D)
 
  Ax = Ay, x = y, and x = y
  E)
 
  Ax = Ay, x = y, and x = y  /2

Question 2

A cup of water is scooped up from a swimming pool of water. Compare the temperature T and the internal energy U of the water, in both the cup and the swimming pool.
 
  A)
 
  TPool is greater than TCup, and the U is the same.
  B)
 
  TPool is less than TCup, and the U is the same.
  C)
 
  TPool is equal to TCup, and UPool is greater than UCup.
  D)
 
  TPool is equal to TCup, and UPool is less than UCup.
  E)
 
  TPool is equal to TCup, and UPool is equal to UCup.

[nhea]

Answer to Question 1

E

Answer to Question 2

C