Asked by Charles

If gear A has 30 teeth and is spinning at 800rpm, gear B has 50 teeth and gear C has 20 teeth and gear D is spinning at 300rpm. How many teeth does gear D have?
Answered by Damon
rpms if all in a row
If any are on the same shaft. I do not have your picture.
B 800*(30/50)
C 800*(30/50)*(50/20)
D 800*(30/50)*(50/20)*(20/N) = 300

or more easily since all teeth are the same size
800*(30/N) = 300
N = 80
Answered by Charles
B and C are on the same shaft
Answered by Damon
Now you tell me !
Answered by Damon
B = 800*30/50 = 480 rpm
so
C = 480 rpm
D = 480 (20/N) = 300
N = 32
Answered by Charles
thank you
Answered by Damon
You are welcome :)
Answered by Puzzled
How exactly does Free Body Diagrams work?
Answered by Damon
Think of the body all alone in space
Add up all the force vectors on it and equate that to mass times acceleration.
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