Centrifugal forces are an apparent reality to observers in a ...

[ss2343]

Centrifugal forces are an apparent reality to observers in a reference frame that is
 
  A) moving at constant velocity.
  B) an inertial reference frame.
  C) at rest.
  D) rotating.
  E) none of the above

Question 2

You can safely stand on the overhanging end of a heavy plank that rests on a table. How much overhang depends on your mass and the plank's mass.
 
  If you can stand on the end of a plank that overhangs the edge of the supporting table 1/4 its total length, how massive is the plank compared to your mass?
  A) 1/2
  B) the same
  C) 1 and 1/2 times
  D) twice
  E) 4 times

[bigcheese9]

Answer to Question 1

Answer: D

Answer to Question 2

Answer: B

[ss2343]

Excellent

[olderstudent]

Gracias!