Author Question: Centrifugal forces are an apparent reality to observers in a reference frame that is A) moving at ... (Read 57 times)

ss2343 · **on:** Jul 29, 2018

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