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Date Posted: 5/16/2008 1:00:07 AM  Status: Live
Tachometer - will rate lifesaver!
Course Textbook Chapter Problem
Classical Mechanics N/A N/A N/A
Question Details:
In a photoelectric tachometer, 24 equally spaced reflectors have been placed on a disk. Calculate the rpm of the disk if 600 cycles per second are detected.

Please show all work, will rate lifesaver! thanks
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Date Posted: 5/16/2008 8:21:33 AM  Status: Live
Asker's Rating: Lifesaver   
Response:
 
in the tachometer 1revolution of disc gives 24 pulses cycles
 
so 600 cycles/sec --------------->  600/24 = 25 revolutions/sec
 
             25/60------------------>   0.42  R.P.M

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Date Posted: 5/20/2008 6:06:57 PM  Status: Live
Asker's Rating: Helpful   
Response:
in the tachometer 1revolution of disc gives 24 pulses cycles
 
so 600 cycles/sec --------------->  600/24 = 25 revolutions/sec
 
             25/60------------------>   0.42  R.P.M      ????

I think that you have to multiply 25 by 60 to get the answer since that would give you RPM.
cadam20's Comment:
your right



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