In Fizeau's experiment for measuring the speed of light, the ...

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In Fizeau's experiment for measuring the speed of light, the wheel has 475 notches. What rotational speed is required for the return beam of light to pass through the next notch? The time between successive notches is 6.65  10-5 s.
 
  A) 20.4 rev/sec
  B) 16.6 rev/sec
  C) 31.7 rev/sec
  D) 66.4 rev/sec
  E) 90.9 rev/sec

Question 2

A uniform solid disk of radius 1.60 m and mass 2.30 kg rolls without slipping to the bottom of an inclined plane. If the angular velocity of the disk is 5.35 rad/s at the bottom, what is the height of the inclined plane?
 
  A) 5.61 m
  B) 4.21 m
  C) 4.94 m
  D) 6.73 m

[briezy]

Answer to Question 1

C

Answer to Question 2

A

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